Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician...
Transcript of Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician...
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CONTENTS
Graphs and its applications
Preliminary Definitions
Asymptote.Horizontal Asymptote.Vertical Asymptote.Asymptotes of a Rational function.Examples
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 2: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/2.jpg)
CONTENTS
Graphs and its applications
Preliminary Definitions
Asymptote.Horizontal Asymptote.Vertical Asymptote.Asymptotes of a Rational function.Examples
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 3: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/3.jpg)
CONTENTS
Graphs and its applications
Preliminary Definitions
Asymptote.
Horizontal Asymptote.Vertical Asymptote.Asymptotes of a Rational function.Examples
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 4: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/4.jpg)
CONTENTS
Graphs and its applications
Preliminary Definitions
Asymptote.Horizontal Asymptote.
Vertical Asymptote.Asymptotes of a Rational function.Examples
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 5: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/5.jpg)
CONTENTS
Graphs and its applications
Preliminary Definitions
Asymptote.Horizontal Asymptote.Vertical Asymptote.
Asymptotes of a Rational function.Examples
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 6: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/6.jpg)
CONTENTS
Graphs and its applications
Preliminary Definitions
Asymptote.Horizontal Asymptote.Vertical Asymptote.Asymptotes of a Rational function.
Examples
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 7: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/7.jpg)
CONTENTS
Graphs and its applications
Preliminary Definitions
Asymptote.Horizontal Asymptote.Vertical Asymptote.Asymptotes of a Rational function.Examples
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 8: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/8.jpg)
INTRODUCTION
French mathematician and philosopher Rene Descartes(1596-1650) devised a simple plan whereby two number lineswere intersected at right angles. This system is called therectangular coordinate system (or Cartesian coordinatesystem)
Graphs are used to summarize and display information in amanner that is easy for most people to comprehend.
Have usage in many academic disciplines, including math,hard sciences and social sciences.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 9: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/9.jpg)
INTRODUCTION
French mathematician and philosopher Rene Descartes(1596-1650) devised a simple plan whereby two number lineswere intersected at right angles. This system is called therectangular coordinate system (or Cartesian coordinatesystem)
Graphs are used to summarize and display information in amanner that is easy for most people to comprehend.
Have usage in many academic disciplines, including math,hard sciences and social sciences.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 10: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/10.jpg)
INTRODUCTION
French mathematician and philosopher Rene Descartes(1596-1650) devised a simple plan whereby two number lineswere intersected at right angles. This system is called therectangular coordinate system (or Cartesian coordinatesystem)
Graphs are used to summarize and display information in amanner that is easy for most people to comprehend.
Have usage in many academic disciplines, including math,hard sciences and social sciences.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 11: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/11.jpg)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 12: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/12.jpg)
PRELIMINARY DEFINITIONS
ASYMPTOTE
An asymptote is a line to which the graph gets arbitrarilyclose.That means that for any distance named, no matter howsmall, the graph will get within that distance and stay within thatdistance for some section of the graph with infinite length.Moreprecisely
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 13: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/13.jpg)
PRELIMINARY DEFINITIONS
ASYMPTOTE
An asymptote is a line to which the graph gets arbitrarilyclose.
That means that for any distance named, no matter howsmall, the graph will get within that distance and stay within thatdistance for some section of the graph with infinite length.Moreprecisely
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 14: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/14.jpg)
PRELIMINARY DEFINITIONS
ASYMPTOTE
An asymptote is a line to which the graph gets arbitrarilyclose.That means that for any distance named, no matter howsmall, the graph will get within that distance
and stay within thatdistance for some section of the graph with infinite length.Moreprecisely
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 15: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/15.jpg)
PRELIMINARY DEFINITIONS
ASYMPTOTE
An asymptote is a line to which the graph gets arbitrarilyclose.That means that for any distance named, no matter howsmall, the graph will get within that distance and stay within thatdistance for some section of the graph with infinite length.
Moreprecisely
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 16: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/16.jpg)
PRELIMINARY DEFINITIONS
ASYMPTOTE
An asymptote is a line to which the graph gets arbitrarilyclose.That means that for any distance named, no matter howsmall, the graph will get within that distance and stay within thatdistance for some section of the graph with infinite length.Moreprecisely
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 17: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/17.jpg)
PRELIMINARY DEFINITIONS
HORIZONTAL ASYMPTOTE
The graph of y = f (x) has a horizontal asymptote of y = b, ifand only if, either
limx→∞
f (x) = b or limx→−∞
f (x) = b. (1)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 18: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/18.jpg)
PRELIMINARY DEFINITIONS
HORIZONTAL ASYMPTOTE
The graph of y = f (x) has a horizontal asymptote of y = b, ifand only if, either
limx→∞
f (x) = b or limx→−∞
f (x) = b. (1)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 19: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/19.jpg)
PRELIMINARY DEFINITIONS
HORIZONTAL ASYMPTOTE
The graph of y = f (x) has a horizontal asymptote of y = b, ifand only if, either
limx→∞
f (x) = b or limx→−∞
f (x) = b. (1)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 20: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/20.jpg)
PRELIMINARY DEFINITIONS
HORIZONTAL ASYMPTOTE
The graph of y = f (x) has a horizontal asymptote of y = b, ifand only if, either
limx→∞
f (x) = b or limx→−∞
f (x) = b. (1)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 21: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/21.jpg)
PRELIMINARY DEFINITIONS
VERTICAL ASYMPTOTE
The graph of y = f (x) has a vertical asymptote of x = c , if andonly if, either
limx→c−
f (x) = ±∞ or limx→c+
f (x) = ±∞. (2)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 22: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/22.jpg)
PRELIMINARY DEFINITIONS
VERTICAL ASYMPTOTE
The graph of y = f (x) has a vertical asymptote of x = c , if andonly if, either
limx→c−
f (x) = ±∞ or limx→c+
f (x) = ±∞. (2)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 23: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/23.jpg)
PRELIMINARY DEFINITIONS
VERTICAL ASYMPTOTE
The graph of y = f (x) has a vertical asymptote of x = c , if andonly if, either
limx→c−
f (x) = ±∞ or limx→c+
f (x) = ±∞. (2)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 24: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/24.jpg)
PRELIMINARY DEFINITIONS
VERTICAL ASYMPTOTE
The graph of y = f (x) has a vertical asymptote of x = c , if andonly if, either
limx→c−
f (x) = ±∞ or limx→c+
f (x) = ±∞. (2)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 25: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/25.jpg)
PRELIMINARY DEFINITIONS
ASYMPTOTES OF A RATIONAL FUNCTIONS
Let r(x) be a rational function with polynomialp(x) = anxn + ... + a0 of degree n in the numeratorand polynomialq(x) = bmxm + ... + b0 of degree m in the denominator
If n < m, then r(x) has a horizontal asymptote of y = 0.
If n > m, then r(x) becomes unbounded for large values of x(positive or negative).
If n = m, then r(x) has a horizontal asymptote of y = anbn
.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 26: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/26.jpg)
PRELIMINARY DEFINITIONS
ASYMPTOTES OF A RATIONAL FUNCTIONS
Let r(x) be a rational function with polynomialp(x) = anxn + ... + a0 of degree n in the numerator
and polynomialq(x) = bmxm + ... + b0 of degree m in the denominator
If n < m, then r(x) has a horizontal asymptote of y = 0.
If n > m, then r(x) becomes unbounded for large values of x(positive or negative).
If n = m, then r(x) has a horizontal asymptote of y = anbn
.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 27: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/27.jpg)
PRELIMINARY DEFINITIONS
ASYMPTOTES OF A RATIONAL FUNCTIONS
Let r(x) be a rational function with polynomialp(x) = anxn + ... + a0 of degree n in the numeratorand polynomialq(x) = bmxm + ... + b0 of degree m in the denominator
If n < m, then r(x) has a horizontal asymptote of y = 0.
If n > m, then r(x) becomes unbounded for large values of x(positive or negative).
If n = m, then r(x) has a horizontal asymptote of y = anbn
.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 28: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/28.jpg)
PRELIMINARY DEFINITIONS
ASYMPTOTES OF A RATIONAL FUNCTIONS
Let r(x) be a rational function with polynomialp(x) = anxn + ... + a0 of degree n in the numeratorand polynomialq(x) = bmxm + ... + b0 of degree m in the denominator
If n < m, then r(x) has a horizontal asymptote of y = 0.
If n > m, then r(x) becomes unbounded for large values of x(positive or negative).
If n = m, then r(x) has a horizontal asymptote of y = anbn
.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 29: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/29.jpg)
PRELIMINARY DEFINITIONS
ASYMPTOTES OF A RATIONAL FUNCTIONS
Let r(x) be a rational function with polynomialp(x) = anxn + ... + a0 of degree n in the numeratorand polynomialq(x) = bmxm + ... + b0 of degree m in the denominator
If n < m, then r(x) has a horizontal asymptote of y = 0.
If n > m, then r(x) becomes unbounded for large values of x(positive or negative).
If n = m, then r(x) has a horizontal asymptote of y = anbn
.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 30: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/30.jpg)
PRELIMINARY DEFINITIONS
ASYMPTOTES OF A RATIONAL FUNCTIONS
Let r(x) be a rational function with polynomialp(x) = anxn + ... + a0 of degree n in the numeratorand polynomialq(x) = bmxm + ... + b0 of degree m in the denominator
If n < m, then r(x) has a horizontal asymptote of y = 0.
If n > m, then r(x) becomes unbounded for large values of x(positive or negative).
If n = m, then r(x) has a horizontal asymptote of y = anbn
.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 31: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/31.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =1
x, (3)
This is defined ∀x 6= 0.Consider the sequence of numbers xn = 1
2 , 13 , 1
4 , 15 , · · · , 1
k fork = 1, 2, · · · , n.These numbers are getting closer and closer to zero.Since r(xn) =
1xn
= 11n
= n.
So, r(xn) = 2, 3, 4, · · · , k, · · · for n = 2, 3, 3, · · · , k, · · · ,which is getting larger and larger, so approaching the verticalline x = o.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 32: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/32.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =1
x, (3)
This is defined ∀x 6= 0.Consider the sequence of numbers xn = 1
2 , 13 , 1
4 , 15 , · · · , 1
k fork = 1, 2, · · · , n.These numbers are getting closer and closer to zero.Since r(xn) =
1xn
= 11n
= n.
So, r(xn) = 2, 3, 4, · · · , k, · · · for n = 2, 3, 3, · · · , k, · · · ,which is getting larger and larger, so approaching the verticalline x = o.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 33: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/33.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =1
x, (3)
This is defined ∀x 6= 0.Consider the sequence of numbers xn = 1
2 , 13 , 1
4 , 15 , · · · , 1
k fork = 1, 2, · · · , n.These numbers are getting closer and closer to zero.Since r(xn) =
1xn
= 11n
= n.
So, r(xn) = 2, 3, 4, · · · , k, · · · for n = 2, 3, 3, · · · , k, · · · ,which is getting larger and larger, so approaching the verticalline x = o.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 34: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/34.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =1
x, (3)
This is defined ∀x 6= 0.
Consider the sequence of numbers xn = 12 , 1
3 , 14 , 1
5 , · · · , 1k for
k = 1, 2, · · · , n.These numbers are getting closer and closer to zero.Since r(xn) =
1xn
= 11n
= n.
So, r(xn) = 2, 3, 4, · · · , k, · · · for n = 2, 3, 3, · · · , k, · · · ,which is getting larger and larger, so approaching the verticalline x = o.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 35: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/35.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =1
x, (3)
This is defined ∀x 6= 0.Consider the sequence of numbers xn = 1
2 , 13 , 1
4 , 15 , · · · , 1
k fork = 1, 2, · · · , n.
These numbers are getting closer and closer to zero.Since r(xn) =
1xn
= 11n
= n.
So, r(xn) = 2, 3, 4, · · · , k, · · · for n = 2, 3, 3, · · · , k, · · · ,which is getting larger and larger, so approaching the verticalline x = o.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 36: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/36.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =1
x, (3)
This is defined ∀x 6= 0.Consider the sequence of numbers xn = 1
2 , 13 , 1
4 , 15 , · · · , 1
k fork = 1, 2, · · · , n.These numbers are getting closer and closer to zero.
Since r(xn) =1xn
= 11n
= n.
So, r(xn) = 2, 3, 4, · · · , k, · · · for n = 2, 3, 3, · · · , k, · · · ,which is getting larger and larger, so approaching the verticalline x = o.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 37: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/37.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =1
x, (3)
This is defined ∀x 6= 0.Consider the sequence of numbers xn = 1
2 , 13 , 1
4 , 15 , · · · , 1
k fork = 1, 2, · · · , n.These numbers are getting closer and closer to zero.Since r(xn) =
1xn
= 11n
= n.
So, r(xn) = 2, 3, 4, · · · , k, · · · for n = 2, 3, 3, · · · , k, · · · ,which is getting larger and larger, so approaching the verticalline x = o.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 38: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/38.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =1
x, (3)
This is defined ∀x 6= 0.Consider the sequence of numbers xn = 1
2 , 13 , 1
4 , 15 , · · · , 1
k fork = 1, 2, · · · , n.These numbers are getting closer and closer to zero.Since r(xn) =
1xn
= 11n
= n.
So, r(xn) = 2, 3, 4, · · · , k, · · · for n = 2, 3, 3, · · · , k, · · · ,which is getting larger and larger, so approaching the verticalline x = o.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 39: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/39.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Thus there is a vertical asymptote at x = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 40: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/40.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Thus there is a vertical asymptote at x = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 41: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/41.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Thus there is a vertical asymptote at x = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 42: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/42.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =10x
2 + x, (4)
Defined ∀x 6= −2
The numerator and denominator are linear functions (degreeof polynomials are the same).
we can see that as x get large then 2 in the denominatorbecomes insignificant.
Thus r(x) ≈ 10xx = 10
Thus horizontal asymptote occurs at x = 10.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 43: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/43.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =10x
2 + x, (4)
Defined ∀x 6= −2
The numerator and denominator are linear functions (degreeof polynomials are the same).
we can see that as x get large then 2 in the denominatorbecomes insignificant.
Thus r(x) ≈ 10xx = 10
Thus horizontal asymptote occurs at x = 10.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 44: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/44.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =10x
2 + x, (4)
Defined ∀x 6= −2
The numerator and denominator are linear functions (degreeof polynomials are the same).
we can see that as x get large then 2 in the denominatorbecomes insignificant.
Thus r(x) ≈ 10xx = 10
Thus horizontal asymptote occurs at x = 10.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 45: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/45.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =10x
2 + x, (4)
Defined ∀x 6= −2
The numerator and denominator are linear functions (degreeof polynomials are the same).
we can see that as x get large then 2 in the denominatorbecomes insignificant.
Thus r(x) ≈ 10xx = 10
Thus horizontal asymptote occurs at x = 10.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 46: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/46.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =10x
2 + x, (4)
Defined ∀x 6= −2
The numerator and denominator are linear functions (degreeof polynomials are the same).
we can see that as x get large then 2 in the denominatorbecomes insignificant.
Thus r(x) ≈ 10xx = 10
Thus horizontal asymptote occurs at x = 10.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 47: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/47.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =10x
2 + x, (4)
Defined ∀x 6= −2
The numerator and denominator are linear functions (degreeof polynomials are the same).
we can see that as x get large then 2 in the denominatorbecomes insignificant.
Thus r(x) ≈ 10xx = 10
Thus horizontal asymptote occurs at x = 10.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 48: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/48.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =10x
2 + x, (4)
Defined ∀x 6= −2
The numerator and denominator are linear functions (degreeof polynomials are the same).
we can see that as x get large then 2 in the denominatorbecomes insignificant.
Thus r(x) ≈ 10xx = 10
Thus horizontal asymptote occurs at x = 10.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 49: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/49.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =10x
2 + x, (4)
Defined ∀x 6= −2
The numerator and denominator are linear functions (degreeof polynomials are the same).
we can see that as x get large then 2 in the denominatorbecomes insignificant.
Thus r(x) ≈ 10xx = 10
Thus horizontal asymptote occurs at x = 10.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 50: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/50.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 51: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/51.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 52: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/52.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(3):
Discuss the Asymptotes of the following rational function
r(x) =4x2
4− x2, (5)
Defined ∀x 6= ±2.Clearly the function passes through the origin, so the x andy -intercept is (x , y) = (0, 0).Note that this function is an even function, the edge of thedomain is x = 2, so we see there are vertical asymptotes atx = 2.Thus, for x large r(x) ≈ 4x2
−x2 = −4.Thus, a horizontal asymptote occurs at y = −4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 53: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/53.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(3):
Discuss the Asymptotes of the following rational function
r(x) =4x2
4− x2, (5)
Defined ∀x 6= ±2.Clearly the function passes through the origin, so the x andy -intercept is (x , y) = (0, 0).Note that this function is an even function, the edge of thedomain is x = 2, so we see there are vertical asymptotes atx = 2.Thus, for x large r(x) ≈ 4x2
−x2 = −4.Thus, a horizontal asymptote occurs at y = −4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 54: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/54.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(3):
Discuss the Asymptotes of the following rational function
r(x) =4x2
4− x2, (5)
Defined ∀x 6= ±2.Clearly the function passes through the origin, so the x andy -intercept is (x , y) = (0, 0).Note that this function is an even function, the edge of thedomain is x = 2, so we see there are vertical asymptotes atx = 2.Thus, for x large r(x) ≈ 4x2
−x2 = −4.Thus, a horizontal asymptote occurs at y = −4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 55: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/55.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(3):
Discuss the Asymptotes of the following rational function
r(x) =4x2
4− x2, (5)
Defined ∀x 6= ±2.
Clearly the function passes through the origin, so the x andy -intercept is (x , y) = (0, 0).Note that this function is an even function, the edge of thedomain is x = 2, so we see there are vertical asymptotes atx = 2.Thus, for x large r(x) ≈ 4x2
−x2 = −4.Thus, a horizontal asymptote occurs at y = −4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 56: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/56.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(3):
Discuss the Asymptotes of the following rational function
r(x) =4x2
4− x2, (5)
Defined ∀x 6= ±2.Clearly the function passes through the origin, so the x andy -intercept is (x , y) = (0, 0).
Note that this function is an even function, the edge of thedomain is x = 2, so we see there are vertical asymptotes atx = 2.Thus, for x large r(x) ≈ 4x2
−x2 = −4.Thus, a horizontal asymptote occurs at y = −4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 57: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/57.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(3):
Discuss the Asymptotes of the following rational function
r(x) =4x2
4− x2, (5)
Defined ∀x 6= ±2.Clearly the function passes through the origin, so the x andy -intercept is (x , y) = (0, 0).Note that this function is an even function, the edge of thedomain is x = 2, so we see there are vertical asymptotes atx = 2.
Thus, for x large r(x) ≈ 4x2
−x2 = −4.Thus, a horizontal asymptote occurs at y = −4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 58: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/58.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(3):
Discuss the Asymptotes of the following rational function
r(x) =4x2
4− x2, (5)
Defined ∀x 6= ±2.Clearly the function passes through the origin, so the x andy -intercept is (x , y) = (0, 0).Note that this function is an even function, the edge of thedomain is x = 2, so we see there are vertical asymptotes atx = 2.Thus, for x large r(x) ≈ 4x2
−x2 = −4.
Thus, a horizontal asymptote occurs at y = −4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 59: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/59.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(3):
Discuss the Asymptotes of the following rational function
r(x) =4x2
4− x2, (5)
Defined ∀x 6= ±2.Clearly the function passes through the origin, so the x andy -intercept is (x , y) = (0, 0).Note that this function is an even function, the edge of thedomain is x = 2, so we see there are vertical asymptotes atx = 2.Thus, for x large r(x) ≈ 4x2
−x2 = −4.Thus, a horizontal asymptote occurs at y = −4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 60: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/60.jpg)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 61: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/61.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
OBLIQUE ASYMPTOTE:
r(x) = p(x)q(x)
= f (x) + g (x)q(x)
.
Obviously deg(g(x)) < deg(q(x)).
Implies g (x)q(x)→ 0 as x → ±∞.
Thus r(x)→ f (x) as x → ±∞.
Particularly if deg(p(x)) is one more less than deg(q(x)),then f (x) is a linear function whose graph is a non-horizontalline in the plane.
That line is called oblique asymptote.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 62: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/62.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
OBLIQUE ASYMPTOTE:
r(x) = p(x)q(x)
= f (x) + g (x)q(x)
.
Obviously deg(g(x)) < deg(q(x)).
Implies g (x)q(x)→ 0 as x → ±∞.
Thus r(x)→ f (x) as x → ±∞.
Particularly if deg(p(x)) is one more less than deg(q(x)),then f (x) is a linear function whose graph is a non-horizontalline in the plane.
That line is called oblique asymptote.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 63: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/63.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
OBLIQUE ASYMPTOTE:
r(x) = p(x)q(x)
= f (x) + g (x)q(x)
.
Obviously deg(g(x)) < deg(q(x)).
Implies g (x)q(x)→ 0 as x → ±∞.
Thus r(x)→ f (x) as x → ±∞.
Particularly if deg(p(x)) is one more less than deg(q(x)),then f (x) is a linear function whose graph is a non-horizontalline in the plane.
That line is called oblique asymptote.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 64: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/64.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
OBLIQUE ASYMPTOTE:
r(x) = p(x)q(x)
= f (x) + g (x)q(x)
.
Obviously deg(g(x)) < deg(q(x)).
Implies g (x)q(x)→ 0 as x → ±∞.
Thus r(x)→ f (x) as x → ±∞.
Particularly if deg(p(x)) is one more less than deg(q(x)),then f (x) is a linear function whose graph is a non-horizontalline in the plane.
That line is called oblique asymptote.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 65: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/65.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
OBLIQUE ASYMPTOTE:
r(x) = p(x)q(x)
= f (x) + g (x)q(x)
.
Obviously deg(g(x)) < deg(q(x)).
Implies g (x)q(x)→ 0 as x → ±∞.
Thus r(x)→ f (x) as x → ±∞.
Particularly if deg(p(x)) is one more less than deg(q(x)),then f (x) is a linear function whose graph is a non-horizontalline in the plane.
That line is called oblique asymptote.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 66: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/66.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
OBLIQUE ASYMPTOTE:
r(x) = p(x)q(x)
= f (x) + g (x)q(x)
.
Obviously deg(g(x)) < deg(q(x)).
Implies g (x)q(x)→ 0 as x → ±∞.
Thus r(x)→ f (x) as x → ±∞.
Particularly if deg(p(x)) is one more less than deg(q(x)),then f (x) is a linear function whose graph is a non-horizontalline in the plane.
That line is called oblique asymptote.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 67: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/67.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
OBLIQUE ASYMPTOTE:
r(x) = p(x)q(x)
= f (x) + g (x)q(x)
.
Obviously deg(g(x)) < deg(q(x)).
Implies g (x)q(x)→ 0 as x → ±∞.
Thus r(x)→ f (x) as x → ±∞.
Particularly if deg(p(x)) is one more less than deg(q(x)),then f (x) is a linear function whose graph is a non-horizontalline in the plane.
That line is called oblique asymptote.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 68: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/68.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =x2 − 3
2x
2x + 1,
=1
2x − 1 +
1
2x + 1. (6)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 69: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/69.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =x2 − 3
2x
2x + 1,
=1
2x − 1 +
1
2x + 1. (6)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 70: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/70.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =x2 − 3
2x
2x + 1,
=1
2x − 1 +
1
2x + 1. (6)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 71: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/71.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =x2 − 3
2x
2x + 1,
=1
2x − 1 +
1
2x + 1. (6)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 72: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/72.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =x2 − 3
2x
2x + 1,
=1
2x − 1 +
1
2x + 1. (6)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 73: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/73.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =x2 − 3
2x
2x + 1,
=1
2x − 1 +
1
2x + 1. (6)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 74: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/74.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(1):
Discuss the Asymptotes of the following rational function
r(x) =x2 − 3
2x
2x + 1,
=1
2x − 1 +
1
2x + 1. (6)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 75: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/75.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
OBLIQUE ASYMPTOTE:
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 76: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/76.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
OBLIQUE ASYMPTOTE:
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 77: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/77.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =x3 − 1
x2 − x − 2,
= x + 1 +3x + 1
x2 − x − 2. (7)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 78: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/78.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =x3 − 1
x2 − x − 2,
= x + 1 +3x + 1
x2 − x − 2. (7)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 79: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/79.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =x3 − 1
x2 − x − 2,
= x + 1 +3x + 1
x2 − x − 2. (7)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 80: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/80.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =x3 − 1
x2 − x − 2,
= x + 1 +3x + 1
x2 − x − 2. (7)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 81: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/81.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =x3 − 1
x2 − x − 2,
= x + 1 +3x + 1
x2 − x − 2. (7)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 82: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/82.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =x3 − 1
x2 − x − 2,
= x + 1 +3x + 1
x2 − x − 2. (7)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 83: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/83.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
EXAMPLE(2):
Discuss the Asymptotes of the following rational function
r(x) =x3 − 1
x2 − x − 2,
= x + 1 +3x + 1
x2 − x − 2. (7)
Clearly the quotient is a linear function.
Thus it is our oblique asymptote.
For more understanding see the graph.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 84: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/84.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
OBLIQUE ASYMPTOTE:
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 85: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/85.jpg)
ASYMPTOTES OF A RATIONAL FUNCTIONS
OBLIQUE ASYMPTOTE:
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 86: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/86.jpg)
ASYMPTOTES IN POLAR COORDINATES
POLAR EQUATION OF A STRAIGHT LINE:
The polar equation of any line is p = r cos(θ − α).where p is the length of the perpendicular from pole to theline.α is the angle which this perpendicular makes with the initialline.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 87: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/87.jpg)
ASYMPTOTES IN POLAR COORDINATES
POLAR EQUATION OF A STRAIGHT LINE:
The polar equation of any line is p = r cos(θ − α).
where p is the length of the perpendicular from pole to theline.α is the angle which this perpendicular makes with the initialline.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 88: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/88.jpg)
ASYMPTOTES IN POLAR COORDINATES
POLAR EQUATION OF A STRAIGHT LINE:
The polar equation of any line is p = r cos(θ − α).where p is the length of the perpendicular from pole to theline.
α is the angle which this perpendicular makes with the initialline.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 89: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/89.jpg)
ASYMPTOTES IN POLAR COORDINATES
POLAR EQUATION OF A STRAIGHT LINE:
The polar equation of any line is p = r cos(θ − α).where p is the length of the perpendicular from pole to theline.α is the angle which this perpendicular makes with the initialline.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 90: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/90.jpg)
ASYMPTOTES IN POLAR COORDINATES
POLAR EQUATION OF A STRAIGHT LINE (PROOF):
Let OX be initial line and P be any point on the line whosepolar coordinates are (r , θ).
Therefore, OP = r and ∠POX = θ.
Let us draw a perpendicular OY on the line from P produced.
Now using 4OPY , we have
cosPOY = OYOP = p
r
p = r cosPOY = r cos(θ − α), (8)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 91: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/91.jpg)
ASYMPTOTES IN POLAR COORDINATES
POLAR EQUATION OF A STRAIGHT LINE (PROOF):
Let OX be initial line and P be any point on the line whosepolar coordinates are (r , θ).
Therefore, OP = r and ∠POX = θ.
Let us draw a perpendicular OY on the line from P produced.
Now using 4OPY , we have
cosPOY = OYOP = p
r
p = r cosPOY = r cos(θ − α), (8)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 92: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/92.jpg)
ASYMPTOTES IN POLAR COORDINATES
POLAR EQUATION OF A STRAIGHT LINE (PROOF):
Let OX be initial line and P be any point on the line whosepolar coordinates are (r , θ).
Therefore, OP = r and ∠POX = θ.
Let us draw a perpendicular OY on the line from P produced.
Now using 4OPY , we have
cosPOY = OYOP = p
r
p = r cosPOY = r cos(θ − α), (8)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 93: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/93.jpg)
ASYMPTOTES IN POLAR COORDINATES
POLAR EQUATION OF A STRAIGHT LINE (PROOF):
Let OX be initial line and P be any point on the line whosepolar coordinates are (r , θ).
Therefore, OP = r and ∠POX = θ.
Let us draw a perpendicular OY on the line from P produced.
Now using 4OPY , we have
cosPOY = OYOP = p
r
p = r cosPOY = r cos(θ − α), (8)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 94: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/94.jpg)
ASYMPTOTES IN POLAR COORDINATES
POLAR EQUATION OF A STRAIGHT LINE (PROOF):
Let OX be initial line and P be any point on the line whosepolar coordinates are (r , θ).
Therefore, OP = r and ∠POX = θ.
Let us draw a perpendicular OY on the line from P produced.
Now using 4OPY , we have
cosPOY = OYOP = p
r
p = r cosPOY = r cos(θ − α), (8)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 95: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/95.jpg)
ASYMPTOTES IN POLAR COORDINATES
POLAR EQUATION OF A STRAIGHT LINE (PROOF):
Let OX be initial line and P be any point on the line whosepolar coordinates are (r , θ).
Therefore, OP = r and ∠POX = θ.
Let us draw a perpendicular OY on the line from P produced.
Now using 4OPY , we have
cosPOY = OYOP = p
r
p = r cosPOY = r cos(θ − α), (8)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 96: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/96.jpg)
ASYMPTOTES IN POLAR COORDINATES
POLAR EQUATION OF A STRAIGHT LINE (PROOF):
Let OX be initial line and P be any point on the line whosepolar coordinates are (r , θ).
Therefore, OP = r and ∠POX = θ.
Let us draw a perpendicular OY on the line from P produced.
Now using 4OPY , we have
cosPOY = OYOP = p
r
p = r cosPOY = r cos(θ − α), (8)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 97: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/97.jpg)
ASYMPTOTES IN POLAR COORDINATES
Now we determine the asymptotes of the curve r = s(θ).
For this we have to determine the constant p and α.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 98: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/98.jpg)
ASYMPTOTES IN POLAR COORDINATES
Now we determine the asymptotes of the curve r = s(θ).
For this we have to determine the constant p and α.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 99: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/99.jpg)
ASYMPTOTES IN POLAR COORDINATES
Now we determine the asymptotes of the curve r = s(θ).
For this we have to determine the constant p and α.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 100: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/100.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Let P(r , θ) be any point on the curve AB whose equation isr = p(θ).
Let us draw a perpendicular OY on the line p = r cos(θ − α)which is MY .
Therefore
PM = LY = OY −OL = p −OP cos(θ − α)
= p − r cos(θ − α). (9)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 101: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/101.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Let P(r , θ) be any point on the curve AB whose equation isr = p(θ).
Let us draw a perpendicular OY on the line p = r cos(θ − α)which is MY .
Therefore
PM = LY = OY −OL = p −OP cos(θ − α)
= p − r cos(θ − α). (9)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 102: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/102.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Let P(r , θ) be any point on the curve AB whose equation isr = p(θ).
Let us draw a perpendicular OY on the line p = r cos(θ − α)which is MY .
Therefore
PM = LY = OY −OL = p −OP cos(θ − α)
= p − r cos(θ − α). (9)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 103: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/103.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Let P(r , θ) be any point on the curve AB whose equation isr = p(θ).
Let us draw a perpendicular OY on the line p = r cos(θ − α)which is MY .
Therefore
PM = LY = OY −OL = p −OP cos(θ − α)
= p − r cos(θ − α). (9)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 104: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/104.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Let P(r , θ) be any point on the curve AB whose equation isr = p(θ).
Let us draw a perpendicular OY on the line p = r cos(θ − α)which is MY .
Therefore
PM = LY = OY −OL = p −OP cos(θ − α)
= p − r cos(θ − α). (9)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 105: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/105.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Let P(r , θ) be any point on the curve AB whose equation isr = p(θ).
Let us draw a perpendicular OY on the line p = r cos(θ − α)which is MY .
Therefore
PM = LY = OY −OL = p −OP cos(θ − α)
= p − r cos(θ − α). (9)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 106: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/106.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Now r → ∞ as the point recedes to infinity along thecurve.Let θ → θ1 where r → ∞.
Therefore we have PMr = p
r − cos(θ − α) by (9). whenr → ∞, PM → 0.
So that
PM
r= PM.
1
r→ 0 and
p
r→ 0. (10)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 107: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/107.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Now r → ∞ as the point recedes to infinity along thecurve.
Let θ → θ1 where r → ∞.
Therefore we have PMr = p
r − cos(θ − α) by (9). whenr → ∞, PM → 0.
So that
PM
r= PM.
1
r→ 0 and
p
r→ 0. (10)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 108: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/108.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Now r → ∞ as the point recedes to infinity along thecurve.Let θ → θ1 where r → ∞.
Therefore we have PMr = p
r − cos(θ − α) by (9). whenr → ∞, PM → 0.
So that
PM
r= PM.
1
r→ 0 and
p
r→ 0. (10)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 109: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/109.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Now r → ∞ as the point recedes to infinity along thecurve.Let θ → θ1 where r → ∞.
Therefore we have PMr = p
r − cos(θ − α) by (9). whenr → ∞, PM → 0.
So that
PM
r= PM.
1
r→ 0 and
p
r→ 0. (10)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 110: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/110.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Now r → ∞ as the point recedes to infinity along thecurve.Let θ → θ1 where r → ∞.
Therefore we have PMr = p
r − cos(θ − α) by (9). whenr → ∞, PM → 0.
So that
PM
r= PM.
1
r→ 0 and
p
r→ 0. (10)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 111: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/111.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Now r → ∞ as the point recedes to infinity along thecurve.Let θ → θ1 where r → ∞.
Therefore we have PMr = p
r − cos(θ − α) by (9). whenr → ∞, PM → 0.
So that
PM
r= PM.
1
r→ 0 and
p
r→ 0. (10)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 112: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/112.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Let
cos(θ − α) = 0
cos(θ − α) = cos(π
2)
θ1 − α =π
2(∵ θ → θ1 as r → ∞)
θ1 = α +π
2
α = θ1 −π
2. (11)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 113: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/113.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Let
cos(θ − α) = 0
cos(θ − α) = cos(π
2)
θ1 − α =π
2(∵ θ → θ1 as r → ∞)
θ1 = α +π
2
α = θ1 −π
2. (11)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 114: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/114.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Let
cos(θ − α) = 0
cos(θ − α) = cos(π
2)
θ1 − α =π
2(∵ θ → θ1 as r → ∞)
θ1 = α +π
2
α = θ1 −π
2. (11)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 115: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/115.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Let
cos(θ − α) = 0
cos(θ − α) = cos(π
2)
θ1 − α =π
2(∵ θ → θ1 as r → ∞)
θ1 = α +π
2
α = θ1 −π
2. (11)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 116: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/116.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Let
cos(θ − α) = 0
cos(θ − α) = cos(π
2)
θ1 − α =π
2(∵ θ → θ1 as r → ∞)
θ1 = α +π
2
α = θ1 −π
2. (11)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 117: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/117.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Let
cos(θ − α) = 0
cos(θ − α) = cos(π
2)
θ1 − α =π
2(∵ θ → θ1 as r → ∞)
θ1 = α +π
2
α = θ1 −π
2. (11)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 118: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/118.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Again from (9), we have when r → ∞
p = limr→∞
[r cos(θ − α)]
= limr→∞
[r cos(θ − θ1 +π
2)]
= limr→∞
[r sin(θ1 − θ)]
= limθ→θ1
[sin(θ1 − θ)
1r
]. . .
0
0(12)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 119: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/119.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Again from (9), we have when r → ∞
p = limr→∞
[r cos(θ − α)]
= limr→∞
[r cos(θ − θ1 +π
2)]
= limr→∞
[r sin(θ1 − θ)]
= limθ→θ1
[sin(θ1 − θ)
1r
]. . .
0
0(12)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 120: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/120.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Again from (9), we have when r → ∞
p = limr→∞
[r cos(θ − α)]
= limr→∞
[r cos(θ − θ1 +π
2)]
= limr→∞
[r sin(θ1 − θ)]
= limθ→θ1
[sin(θ1 − θ)
1r
]. . .
0
0(12)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 121: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/121.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Again from (9), we have when r → ∞
p = limr→∞
[r cos(θ − α)]
= limr→∞
[r cos(θ − θ1 +π
2)]
= limr→∞
[r sin(θ1 − θ)]
= limθ→θ1
[sin(θ1 − θ)
1r
]. . .
0
0(12)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 122: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/122.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Again from (9), we have when r → ∞
p = limr→∞
[r cos(θ − α)]
= limr→∞
[r cos(θ − θ1 +π
2)]
= limr→∞
[r sin(θ1 − θ)]
= limθ→θ1
[sin(θ1 − θ)
1r
]. . .
0
0(12)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 123: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/123.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Again from (9), we have when r → ∞
p = limr→∞
[r cos(θ − α)]
= limr→∞
[r cos(θ − θ1 +π
2)]
= limr→∞
[r sin(θ1 − θ)]
= limθ→θ1
[sin(θ1 − θ)
1r
]. . .
0
0
(12)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 124: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/124.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
Again from (9), we have when r → ∞
p = limr→∞
[r cos(θ − α)]
= limr→∞
[r cos(θ − θ1 +π
2)]
= limr→∞
[r sin(θ1 − θ)]
= limθ→θ1
[sin(θ1 − θ)
1r
]. . .
0
0(12)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 125: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/125.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
p = limθ→θ1
[cos(θ1 − θ)
− 1r2
drdθ
]
=limθ→θ1(cos(θ1 − θ))
limθ→θ1(− 1r2
drdθ )
. (13)
Now let u = 1r ,this implies du
dθ = − 1r2
drdθ . Therefore (13)
becomes
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 126: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/126.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
p = limθ→θ1
[cos(θ1 − θ)
− 1r2
drdθ
]
=limθ→θ1(cos(θ1 − θ))
limθ→θ1(− 1r2
drdθ )
. (13)
Now let u = 1r ,this implies du
dθ = − 1r2
drdθ . Therefore (13)
becomes
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 127: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/127.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
p = limθ→θ1
[cos(θ1 − θ)
− 1r2
drdθ
]
=limθ→θ1(cos(θ1 − θ))
limθ→θ1(− 1r2
drdθ )
. (13)
Now let u = 1r ,this implies du
dθ = − 1r2
drdθ . Therefore (13)
becomes
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 128: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/128.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
p = limθ→θ1
[cos(θ1 − θ)
− 1r2
drdθ
]
=limθ→θ1(cos(θ1 − θ))
limθ→θ1(− 1r2
drdθ )
. (13)
Now let u = 1r ,
this implies dudθ = − 1
r2drdθ . Therefore (13)
becomes
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 129: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/129.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
p = limθ→θ1
[cos(θ1 − θ)
− 1r2
drdθ
]
=limθ→θ1(cos(θ1 − θ))
limθ→θ1(− 1r2
drdθ )
. (13)
Now let u = 1r ,this implies du
dθ = − 1r2
drdθ . Therefore (13)
becomes
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 130: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/130.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
p = limθ→θ1
[cos(θ1 − θ)
− 1r2
drdθ
]
=limθ→θ1(cos(θ1 − θ))
limθ→θ1(− 1r2
drdθ )
. (13)
Now let u = 1r ,this implies du
dθ = − 1r2
drdθ . Therefore (13)
becomes
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 131: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/131.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
p = limθ→θ1−dθ
du. (14)
Hence the asymptotes is
limθ→θ1−dθ
du= r cos(θ − α)
= r cos(θ − θ1 +π
2)
= r sin(θ1 − θ), (15)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 132: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/132.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
p = limθ→θ1−dθ
du. (14)
Hence the asymptotes is
limθ→θ1−dθ
du= r cos(θ − α)
= r cos(θ − θ1 +π
2)
= r sin(θ1 − θ), (15)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 133: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/133.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
p = limθ→θ1−dθ
du. (14)
Hence the asymptotes is
limθ→θ1−dθ
du= r cos(θ − α)
= r cos(θ − θ1 +π
2)
= r sin(θ1 − θ), (15)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 134: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/134.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
p = limθ→θ1−dθ
du. (14)
Hence the asymptotes is
limθ→θ1−dθ
du= r cos(θ − α)
= r cos(θ − θ1 +π
2)
= r sin(θ1 − θ), (15)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 135: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/135.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
p = limθ→θ1−dθ
du. (14)
Hence the asymptotes is
limθ→θ1−dθ
du= r cos(θ − α)
= r cos(θ − θ1 +π
2)
= r sin(θ1 − θ), (15)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 136: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/136.jpg)
ASYMPTOTES IN POLAR COORDINATES
CONSTRUCTION:
p = limθ→θ1−dθ
du. (14)
Hence the asymptotes is
limθ→θ1−dθ
du= r cos(θ − α)
= r cos(θ − θ1 +π
2)
= r sin(θ1 − θ), (15)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 137: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/137.jpg)
ASYMPTOTES IN POLAR COORDINATES
WORKING RULES:
We have to change r to 1u in the given equation and find out
the limit of θ as u → 0.
Let θ1 be any one of the angle possible limits of θ.
We have to determine then − dθdu and its limit as u → 0 and
θ → θ1.
Let this limit be p.
Then p = r sin(θ1 − θ) is the required asymptote.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 138: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/138.jpg)
ASYMPTOTES IN POLAR COORDINATES
WORKING RULES:
We have to change r to 1u in the given equation and find out
the limit of θ as u → 0.
Let θ1 be any one of the angle possible limits of θ.
We have to determine then − dθdu and its limit as u → 0 and
θ → θ1.
Let this limit be p.
Then p = r sin(θ1 − θ) is the required asymptote.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 139: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/139.jpg)
ASYMPTOTES IN POLAR COORDINATES
WORKING RULES:
We have to change r to 1u in the given equation and find out
the limit of θ as u → 0.
Let θ1 be any one of the angle possible limits of θ.
We have to determine then − dθdu and its limit as u → 0 and
θ → θ1.
Let this limit be p.
Then p = r sin(θ1 − θ) is the required asymptote.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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ASYMPTOTES IN POLAR COORDINATES
WORKING RULES:
We have to change r to 1u in the given equation and find out
the limit of θ as u → 0.
Let θ1 be any one of the angle possible limits of θ.
We have to determine then − dθdu and its limit as u → 0 and
θ → θ1.
Let this limit be p.
Then p = r sin(θ1 − θ) is the required asymptote.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 141: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/141.jpg)
ASYMPTOTES IN POLAR COORDINATES
WORKING RULES:
We have to change r to 1u in the given equation and find out
the limit of θ as u → 0.
Let θ1 be any one of the angle possible limits of θ.
We have to determine then − dθdu and its limit as u → 0 and
θ → θ1.
Let this limit be p.
Then p = r sin(θ1 − θ) is the required asymptote.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 142: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/142.jpg)
ASYMPTOTES IN POLAR COORDINATES
WORKING RULES:
We have to change r to 1u in the given equation and find out
the limit of θ as u → 0.
Let θ1 be any one of the angle possible limits of θ.
We have to determine then − dθdu and its limit as u → 0 and
θ → θ1.
Let this limit be p.
Then p = r sin(θ1 − θ) is the required asymptote.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 143: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/143.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
Find the asymptotes of the curve
r sin(θ) = 2 cos(2θ) (16)
Step1:(16) implies
r =2 cos 2θ
sin θ1
r=
sin θ
2 cos 2θ, (17)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 144: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/144.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
Find the asymptotes of the curve
r sin(θ) = 2 cos(2θ) (16)
Step1:(16) implies
r =2 cos 2θ
sin θ1
r=
sin θ
2 cos 2θ, (17)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 145: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/145.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
Find the asymptotes of the curve
r sin(θ) = 2 cos(2θ) (16)
Step1:(16) implies
r =2 cos 2θ
sin θ1
r=
sin θ
2 cos 2θ, (17)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 146: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/146.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
Find the asymptotes of the curve
r sin(θ) = 2 cos(2θ) (16)
Step1:(16) implies
r =2 cos 2θ
sin θ1
r=
sin θ
2 cos 2θ, (17)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 147: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/147.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
Find the asymptotes of the curve
r sin(θ) = 2 cos(2θ) (16)
Step1:(16) implies
r =2 cos 2θ
sin θ
1
r=
sin θ
2 cos 2θ, (17)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 148: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/148.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
Find the asymptotes of the curve
r sin(θ) = 2 cos(2θ) (16)
Step1:(16) implies
r =2 cos 2θ
sin θ1
r=
sin θ
2 cos 2θ, (17)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 149: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/149.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
Find the asymptotes of the curve
r sin(θ) = 2 cos(2θ) (16)
Step1:(16) implies
r =2 cos 2θ
sin θ1
r=
sin θ
2 cos 2θ, (17)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 150: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/150.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
according to working rules , we can write (17) as
u =sin θ
2 cos 2θ. (18)
Step2: As u → 0 then θ → nπ, n ∈ Z .
Step3: Now we determine − limθ→nπ(dθdu )
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 151: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/151.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
according to working rules , we can write (17) as
u =sin θ
2 cos 2θ. (18)
Step2: As u → 0 then θ → nπ, n ∈ Z .
Step3: Now we determine − limθ→nπ(dθdu )
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 152: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/152.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
according to working rules , we can write (17) as
u =sin θ
2 cos 2θ. (18)
Step2: As u → 0 then θ → nπ, n ∈ Z .
Step3: Now we determine − limθ→nπ(dθdu )
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 153: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/153.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
according to working rules , we can write (17) as
u =sin θ
2 cos 2θ. (18)
Step2: As u → 0 then θ → nπ, n ∈ Z .
Step3: Now we determine − limθ→nπ(dθdu )
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 154: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/154.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
according to working rules , we can write (17) as
u =sin θ
2 cos 2θ. (18)
Step2: As u → 0 then θ → nπ, n ∈ Z .
Step3: Now we determine − limθ→nπ(dθdu )
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 155: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/155.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
− limθ→nπ
(du
dθ
)= lim
θ→nπ
cos 2θ cos θ − sin θ(−2 sin 2θ)
cos2 2θ
=cos2(2nπ)
cos(2π) cos(π)− sin(π)(−2 sin(2π)
=2
cos(nπ)
=2
(−1)n. (19)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
− limθ→nπ
(du
dθ
)= lim
θ→nπ
cos 2θ cos θ − sin θ(−2 sin 2θ)
cos2 2θ
=cos2(2nπ)
cos(2π) cos(π)− sin(π)(−2 sin(2π)
=2
cos(nπ)
=2
(−1)n. (19)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
− limθ→nπ
(du
dθ
)= lim
θ→nπ
cos 2θ cos θ − sin θ(−2 sin 2θ)
cos2 2θ
=cos2(2nπ)
cos(2π) cos(π)− sin(π)(−2 sin(2π)
=2
cos(nπ)
=2
(−1)n. (19)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 158: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/158.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
− limθ→nπ
(du
dθ
)= lim
θ→nπ
cos 2θ cos θ − sin θ(−2 sin 2θ)
cos2 2θ
=cos2(2nπ)
cos(2π) cos(π)− sin(π)(−2 sin(2π)
=2
cos(nπ)
=2
(−1)n. (19)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 159: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/159.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
− limθ→nπ
(du
dθ
)= lim
θ→nπ
cos 2θ cos θ − sin θ(−2 sin 2θ)
cos2 2θ
=cos2(2nπ)
cos(2π) cos(π)− sin(π)(−2 sin(2π)
=2
cos(nπ)
=2
(−1)n. (19)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 160: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/160.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
Step4: This limit be p. That is p = − 2(−1)n . Hence, the
required asymptotes are
r sin(nπ − θ) = − 2
(−1)n
r [(−1)n−1 sin θ] =2
(−1)n
r sin(θ) = 2. (20)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
Step4: This limit be p. That is p = − 2(−1)n . Hence, the
required asymptotes are
r sin(nπ − θ) = − 2
(−1)n
r [(−1)n−1 sin θ] =2
(−1)n
r sin(θ) = 2. (20)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 162: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/162.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
Step4: This limit be p. That is p = − 2(−1)n . Hence, the
required asymptotes are
r sin(nπ − θ) = − 2
(−1)n
r [(−1)n−1 sin θ] =2
(−1)n
r sin(θ) = 2. (20)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 163: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/163.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
Step4: This limit be p. That is p = − 2(−1)n . Hence, the
required asymptotes are
r sin(nπ − θ) = − 2
(−1)n
r [(−1)n−1 sin θ] =2
(−1)n
r sin(θ) = 2. (20)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 164: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/164.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXAMPLE(1):
Step4: This limit be p. That is p = − 2(−1)n . Hence, the
required asymptotes are
r sin(nπ − θ) = − 2
(−1)n
r [(−1)n−1 sin θ] =2
(−1)n
r sin(θ) = 2. (20)
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 165: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/165.jpg)
ASYMPTOTES IN POLAR COORDINATES
EXERCISES):
Find the asymptotes of the curve r = r tan θ.
Find the asymptotes of the curve r sin nθ = a.
Find the equations of the horizontal asymptote for thefollowing rational curves1−6x3x+7
1+2x2
3x3−44x2−3x+12x2−1
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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ASYMPTOTES IN POLAR COORDINATES
EXERCISES):
Find the asymptotes of the curve r = r tan θ.
Find the asymptotes of the curve r sin nθ = a.
Find the equations of the horizontal asymptote for thefollowing rational curves1−6x3x+7
1+2x2
3x3−44x2−3x+12x2−1
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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ASYMPTOTES IN POLAR COORDINATES
EXERCISES):
Find the equations of the oblique asymptote for the followingrational curves3x3+2x2−x−15x2−3x+1
x+2x2+2x−2(1−x)3
x2
x3−3x2x2−1
Find the equations of the asymptotes of the following curves
(x − y)2(x2 + y2)− 10(x − y)x2 + 12y2 + 2x + y = 0
x2y + xy2 + xy + y2 + 3x = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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ASYMPTOTES IN POLAR COORDINATES
EXERCISES):
Find the equations of the oblique asymptote for the followingrational curves3x3+2x2−x−15x2−3x+1
x+2x2+2x−2(1−x)3
x2
x3−3x2x2−1
Find the equations of the asymptotes of the following curves
(x − y)2(x2 + y2)− 10(x − y)x2 + 12y2 + 2x + y = 0
x2y + xy2 + xy + y2 + 3x = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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MAXIMA AND MINIMA
ABSOLUTE MAXIMUM:
A function f has an absolute maximum (or global maximum)at c if f (c) ≥ f (x) for all x in D.
Where D is the domain of f .
The number f (c) is called the maximum value of f on D.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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MAXIMA AND MINIMA
ABSOLUTE MAXIMUM:
A function f has an absolute maximum (or global maximum)at c
if f (c) ≥ f (x) for all x in D.
Where D is the domain of f .
The number f (c) is called the maximum value of f on D.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 171: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/171.jpg)
MAXIMA AND MINIMA
ABSOLUTE MAXIMUM:
A function f has an absolute maximum (or global maximum)at c if f (c) ≥ f (x) for all x in D.
Where D is the domain of f .
The number f (c) is called the maximum value of f on D.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 172: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/172.jpg)
MAXIMA AND MINIMA
ABSOLUTE MAXIMUM:
A function f has an absolute maximum (or global maximum)at c if f (c) ≥ f (x) for all x in D.
Where D is the domain of f .
The number f (c) is called the maximum value of f on D.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 173: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/173.jpg)
MAXIMA AND MINIMA
ABSOLUTE MAXIMUM:
A function f has an absolute maximum (or global maximum)at c if f (c) ≥ f (x) for all x in D.
Where D is the domain of f .
The number f (c) is called the maximum value of f on D.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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MAXIMA AND MINIMA
ABSOLUTE MAXIMUM:
A function f has an absolute maximum (or global maximum)at c if f (c) ≥ f (x) for all x in D.
Where D is the domain of f .
The number f (c) is called the maximum value of f on D.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 175: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/175.jpg)
MAXIMA AND MINIMA
ABSOLUTE MINIMA:
A function f has an absolute minimum (or global minimum)at d if f (d) ≤ f (x) for all x in D.
Where D is the domain of f .
The number f (d) is called the minimum value of f on D.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 176: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/176.jpg)
MAXIMA AND MINIMA
ABSOLUTE MINIMA:
A function f has an absolute minimum (or global minimum)at d
if f (d) ≤ f (x) for all x in D.
Where D is the domain of f .
The number f (d) is called the minimum value of f on D.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 177: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/177.jpg)
MAXIMA AND MINIMA
ABSOLUTE MINIMA:
A function f has an absolute minimum (or global minimum)at d if f (d) ≤ f (x) for all x in D.
Where D is the domain of f .
The number f (d) is called the minimum value of f on D.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 178: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/178.jpg)
MAXIMA AND MINIMA
ABSOLUTE MINIMA:
A function f has an absolute minimum (or global minimum)at d if f (d) ≤ f (x) for all x in D.
Where D is the domain of f .
The number f (d) is called the minimum value of f on D.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 179: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/179.jpg)
MAXIMA AND MINIMA
ABSOLUTE MINIMA:
A function f has an absolute minimum (or global minimum)at d if f (d) ≤ f (x) for all x in D.
Where D is the domain of f .
The number f (d) is called the minimum value of f on D.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 180: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/180.jpg)
MAXIMA AND MINIMA
ABSOLUTE MINIMA:
A function f has an absolute minimum (or global minimum)at d if f (d) ≤ f (x) for all x in D.
Where D is the domain of f .
The number f (d) is called the minimum value of f on D.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 181: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/181.jpg)
MAXIMA AND MINIMA
LOCAL MAXIMUM OR MINIMUM:
A function f has a local maximum (or relative maximum) at cif f (c) ≥ f (x) when x is near c .This means that f (c) ≥ f (x) for all x in some open intervalcontaining c .Similarly, f has a local minimum (or relative minimum) at d iff (d) ≤ f (x) when x is near c .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 182: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/182.jpg)
MAXIMA AND MINIMA
LOCAL MAXIMUM OR MINIMUM:
A function f has a local maximum (or relative maximum) at cif f (c) ≥ f (x) when x is near c .
This means that f (c) ≥ f (x) for all x in some open intervalcontaining c .Similarly, f has a local minimum (or relative minimum) at d iff (d) ≤ f (x) when x is near c .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 183: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/183.jpg)
MAXIMA AND MINIMA
LOCAL MAXIMUM OR MINIMUM:
A function f has a local maximum (or relative maximum) at cif f (c) ≥ f (x) when x is near c .This means that f (c) ≥ f (x) for all x in some open intervalcontaining c .
Similarly, f has a local minimum (or relative minimum) at d iff (d) ≤ f (x) when x is near c .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 184: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/184.jpg)
MAXIMA AND MINIMA
LOCAL MAXIMUM OR MINIMUM:
A function f has a local maximum (or relative maximum) at cif f (c) ≥ f (x) when x is near c .This means that f (c) ≥ f (x) for all x in some open intervalcontaining c .Similarly, f has a local minimum (or relative minimum) at d iff (d) ≤ f (x) when x is near c .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 185: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/185.jpg)
MAXIMA AND MINIMA
LOCAL MAXIMUM OR MINIMUM:
A function f has a local maximum (or relative maximum) at cif f (c) ≥ f (x) when x is near c .This means that f (c) ≥ f (x) for all x in some open intervalcontaining c .Similarly, f has a local minimum (or relative minimum) at d iff (d) ≤ f (x) when x is near c .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 186: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/186.jpg)
MAXIMA AND MINIMA
LOCAL MAXIMUM OR MINIMUM:
A function f has a local maximum (or relative maximum) at cif f (c) ≥ f (x) when x is near c .This means that f (c) ≥ f (x) for all x in some open intervalcontaining c .Similarly, f has a local minimum (or relative minimum) at d iff (d) ≤ f (x) when x is near c .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 187: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/187.jpg)
MAXIMA AND MINIMA
EXAMPLES:
Let f (x) = x2, x ∈ R
f (x) has absolute and local minimum at x = 0.
Having no absolute or local maximum.
The right most diagram showing the function behavior whenx ∈ (−∞, 0) ∪ (0, ∞).
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 188: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/188.jpg)
MAXIMA AND MINIMA
EXAMPLES:
Let f (x) = x2, x ∈ R
f (x) has absolute and local minimum at x = 0.
Having no absolute or local maximum.
The right most diagram showing the function behavior whenx ∈ (−∞, 0) ∪ (0, ∞).
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 189: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/189.jpg)
MAXIMA AND MINIMA
EXAMPLES:
Let f (x) = x2, x ∈ R
f (x) has absolute and local minimum at x = 0.
Having no absolute or local maximum.
The right most diagram showing the function behavior whenx ∈ (−∞, 0) ∪ (0, ∞).
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 190: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/190.jpg)
MAXIMA AND MINIMA
EXAMPLES:
Let f (x) = x2, x ∈ R
f (x) has absolute and local minimum at x = 0.
Having no absolute or local maximum.
The right most diagram showing the function behavior whenx ∈ (−∞, 0) ∪ (0, ∞).
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 191: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/191.jpg)
MAXIMA AND MINIMA
EXAMPLES:
Let f (x) = x2, x ∈ R
f (x) has absolute and local minimum at x = 0.
Having no absolute or local maximum.
The right most diagram showing the function behavior whenx ∈ (−∞, 0) ∪ (0, ∞).
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 192: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/192.jpg)
MAXIMA AND MINIMA
EXAMPLES:
Let f (x) = x2, x ∈ R
f (x) has absolute and local minimum at x = 0.
Having no absolute or local maximum.
The right most diagram showing the function behavior whenx ∈ (−∞, 0) ∪ (0, ∞).
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 193: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/193.jpg)
MAXIMA AND MINIMA
LOCAL EXAMPLES:
Let f (x) = f (x) = x4 + x3 − 11x2 − 9x + 18 =(x − 3)(x − 1)(x + 2)(x + 3), x ∈ R
f (x) has the absolute minimum at x ≈ 2.2 and has noabsolute maximum.
It has two local minima at x ≈ −2.6 and x ≈ 2.2.
Having local maximum at x ≈ −0.4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 194: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/194.jpg)
MAXIMA AND MINIMA
LOCAL EXAMPLES:
Let f (x) = f (x) = x4 + x3 − 11x2 − 9x + 18 =(x − 3)(x − 1)(x + 2)(x + 3), x ∈ R
f (x) has the absolute minimum at x ≈ 2.2 and has noabsolute maximum.
It has two local minima at x ≈ −2.6 and x ≈ 2.2.
Having local maximum at x ≈ −0.4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 195: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/195.jpg)
MAXIMA AND MINIMA
LOCAL EXAMPLES:
Let f (x) = f (x) = x4 + x3 − 11x2 − 9x + 18 =(x − 3)(x − 1)(x + 2)(x + 3), x ∈ R
f (x) has the absolute minimum at x ≈ 2.2 and has noabsolute maximum.
It has two local minima at x ≈ −2.6 and x ≈ 2.2.
Having local maximum at x ≈ −0.4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 196: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/196.jpg)
MAXIMA AND MINIMA
LOCAL EXAMPLES:
Let f (x) = f (x) = x4 + x3 − 11x2 − 9x + 18 =(x − 3)(x − 1)(x + 2)(x + 3), x ∈ R
f (x) has the absolute minimum at x ≈ 2.2 and has noabsolute maximum.
It has two local minima at x ≈ −2.6 and x ≈ 2.2.
Having local maximum at x ≈ −0.4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 197: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/197.jpg)
MAXIMA AND MINIMA
LOCAL EXAMPLES:
Let f (x) = f (x) = x4 + x3 − 11x2 − 9x + 18 =(x − 3)(x − 1)(x + 2)(x + 3), x ∈ R
f (x) has the absolute minimum at x ≈ 2.2 and has noabsolute maximum.
It has two local minima at x ≈ −2.6 and x ≈ 2.2.
Having local maximum at x ≈ −0.4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 198: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/198.jpg)
MAXIMA AND MINIMA
LOCAL EXAMPLES:
Let f (x) = f (x) = x4 + x3 − 11x2 − 9x + 18 =(x − 3)(x − 1)(x + 2)(x + 3), x ∈ R
f (x) has the absolute minimum at x ≈ 2.2 and has noabsolute maximum.
It has two local minima at x ≈ −2.6 and x ≈ 2.2.
Having local maximum at x ≈ −0.4.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 199: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/199.jpg)
MAXIMA AND MINIMA
LOCAL EXAMPLES:
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 200: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/200.jpg)
MAXIMA AND MINIMA
LOCAL EXAMPLES:
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 201: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/201.jpg)
EXTREME VALUE THEOREM
If f is continuous on a closed interval [a, b],
then f attains anabsolute maximum value f (c) at some number c and an absoluteminimum value f (d) at some number d .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 202: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/202.jpg)
EXTREME VALUE THEOREM
If f is continuous on a closed interval [a, b],then f attains anabsolute maximum value f (c) at some number c
and an absoluteminimum value f (d) at some number d .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 203: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/203.jpg)
EXTREME VALUE THEOREM
If f is continuous on a closed interval [a, b],then f attains anabsolute maximum value f (c) at some number c and an absoluteminimum value f (d) at some number d .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 204: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/204.jpg)
FERMATS THEOREM
If f has a local maximum or minimum at some number c ,
and iff′(c) exists, then f ′(c) = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 205: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/205.jpg)
FERMATS THEOREM
If f has a local maximum or minimum at some number c , and iff′(c) exists,
then f ′(c) = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 206: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/206.jpg)
FERMATS THEOREM
If f has a local maximum or minimum at some number c , and iff′(c) exists, then f ′(c) = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 207: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/207.jpg)
FERMATS THEOREM
If f has a local maximum or minimum at some number c , and iff′(c) exists, then f ′(c) = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 208: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/208.jpg)
FERMATS THEOREM
REMARK(1):
The converse of this theorem is not true.
In other words, when f ′(c) = 0, f does not necessarily have alocal maximum or minimum.
For example, if f (x) = x3, then f′(x) = 3x2 equals 0 at
x = 0.
But, x = 0 is not a point of a local minimum or maximum.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 209: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/209.jpg)
FERMATS THEOREM
REMARK(1):
The converse of this theorem is not true.
In other words, when f ′(c) = 0, f does not necessarily have alocal maximum or minimum.
For example, if f (x) = x3, then f′(x) = 3x2 equals 0 at
x = 0.
But, x = 0 is not a point of a local minimum or maximum.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 210: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/210.jpg)
FERMATS THEOREM
REMARK(1):
The converse of this theorem is not true.
In other words, when f ′(c) = 0, f does not necessarily have alocal maximum or minimum.
For example, if f (x) = x3, then f′(x) = 3x2 equals 0 at
x = 0.
But, x = 0 is not a point of a local minimum or maximum.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 211: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/211.jpg)
FERMATS THEOREM
REMARK(1):
The converse of this theorem is not true.
In other words, when f ′(c) = 0, f does not necessarily have alocal maximum or minimum.
For example, if f (x) = x3, then f′(x) = 3x2 equals 0 at
x = 0.
But, x = 0 is not a point of a local minimum or maximum.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 212: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/212.jpg)
FERMATS THEOREM
REMARK(1):
The converse of this theorem is not true.
In other words, when f ′(c) = 0, f does not necessarily have alocal maximum or minimum.
For example, if f (x) = x3, then f′(x) = 3x2 equals 0 at
x = 0.
But, x = 0 is not a point of a local minimum or maximum.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 213: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/213.jpg)
FERMATS THEOREM
REMARK(2):
Sometimes f′(c) does not exist, but some number f (c) is a
point of a local maximum or minimum.
For example, if f (x) = |x |, then f′(0) does not exist.
But f (x) has its local (and absolute) minimum at x = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 214: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/214.jpg)
FERMATS THEOREM
REMARK(2):
Sometimes f′(c) does not exist, but some number f (c) is a
point of a local maximum or minimum.
For example, if f (x) = |x |, then f′(0) does not exist.
But f (x) has its local (and absolute) minimum at x = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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FERMATS THEOREM
REMARK(2):
Sometimes f′(c) does not exist, but some number f (c) is a
point of a local maximum or minimum.
For example, if f (x) = |x |, then f′(0) does not exist.
But f (x) has its local (and absolute) minimum at x = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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FERMATS THEOREM
REMARK(2):
Sometimes f′(c) does not exist, but some number f (c) is a
point of a local maximum or minimum.
For example, if f (x) = |x |, then f′(0) does not exist.
But f (x) has its local (and absolute) minimum at x = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 217: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/217.jpg)
FERMATS THEOREM
REMARK(2):
Sometimes f′(c) does not exist, but some number f (c) is a
point of a local maximum or minimum.
For example, if f (x) = |x |, then f′(0) does not exist.
But f (x) has its local (and absolute) minimum at x = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 218: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/218.jpg)
CRITICAL NUMBER
A critical number of a function f is a number c in the domain of fsuch that either f
′(c) = 0 or f
′(c) does not exist.
REMARK(3):
From Fermat’s Theorem it follows that if f has a local maximumor minimum at c , then c is a critical number of f .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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CRITICAL NUMBER
A critical number of a function f is a number c in the domain of fsuch that either f
′(c) = 0 or f
′(c) does not exist.
REMARK(3):
From Fermat’s Theorem it follows that if f has a local maximumor minimum at c , then c is a critical number of f .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 220: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/220.jpg)
CRITICAL NUMBER
EXAMPLES:
If f (x) = 2x2 + 5x − 1, x ∈ R, then f′(x) = 4x + 5. Hence
the only critical number of f is x = − 54 .
If f (x) =3√x2, x ∈ R, then f
′(x) = 2
3x−13 . Hence the only
critical number of f is x = 0.
If f (x) = 1x , x ∈ R− {0}, then f
′(x) = − 1
x2. Since x = 0
is not in the domain, f has no critical numbers.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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CRITICAL NUMBER
EXAMPLES:
If f (x) = 2x2 + 5x − 1, x ∈ R, then f′(x) = 4x + 5. Hence
the only critical number of f is x = − 54 .
If f (x) =3√x2, x ∈ R, then f
′(x) = 2
3x−13 . Hence the only
critical number of f is x = 0.
If f (x) = 1x , x ∈ R− {0}, then f
′(x) = − 1
x2. Since x = 0
is not in the domain, f has no critical numbers.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 222: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/222.jpg)
CRITICAL NUMBER
EXAMPLES:
If f (x) = 2x2 + 5x − 1, x ∈ R, then f′(x) = 4x + 5. Hence
the only critical number of f is x = − 54 .
If f (x) =3√x2, x ∈ R, then f
′(x) = 2
3x−13 . Hence the only
critical number of f is x = 0.
If f (x) = 1x , x ∈ R− {0}, then f
′(x) = − 1
x2. Since x = 0
is not in the domain, f has no critical numbers.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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CRITICAL NUMBER
EXAMPLES
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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CRITICAL NUMBER
EXAMPLES
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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CRITICAL NUMBER
EXERCISE
Find the critical numbers of f (x) = 2x3 − 9x2 + 12x − 5.
Find the critical numbers of f (x) = 2x + 33√x2.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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CRITICAL NUMBER
EXERCISE
Find the critical numbers of f (x) = 2x3 − 9x2 + 12x − 5.
Find the critical numbers of f (x) = 2x + 33√x2.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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RELATIVE MAXIMA AND MINIMA
FIRST DERIVATIVE TEAT
If f′(x) > 0 on an open interval extending left from c and
f′(x) < 0 on an open interval extending right from c , then f
has a relative maximum at c .
If f′(x) < 0 on an open interval extending left from c and
f′(x) > 0 on an open interval extending right from c , then f
has a relative minimum at c .
If f′(x) has the same sign on both an open interval extending
left from c and an open interval extending right from c, thenf does not have a relative extremum at c .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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RELATIVE MAXIMA AND MINIMA
FIRST DERIVATIVE TEAT
If f′(x) > 0 on an open interval extending left from c and
f′(x) < 0 on an open interval extending right from c , then f
has a relative maximum at c .
If f′(x) < 0 on an open interval extending left from c and
f′(x) > 0 on an open interval extending right from c , then f
has a relative minimum at c .
If f′(x) has the same sign on both an open interval extending
left from c and an open interval extending right from c, thenf does not have a relative extremum at c .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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RELATIVE MAXIMA AND MINIMA
FIRST DERIVATIVE TEAT
If f′(x) > 0 on an open interval extending left from c and
f′(x) < 0 on an open interval extending right from c , then f
has a relative maximum at c .
If f′(x) < 0 on an open interval extending left from c and
f′(x) > 0 on an open interval extending right from c , then f
has a relative minimum at c .
If f′(x) has the same sign on both an open interval extending
left from c and an open interval extending right from c, thenf does not have a relative extremum at c .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 230: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/230.jpg)
RELATIVE MAXIMA AND MINIMA
FIRST DERIVATIVE TEAT
If f′(x) > 0 on an open interval extending left from c and
f′(x) < 0 on an open interval extending right from c , then f
has a relative maximum at c .
If f′(x) < 0 on an open interval extending left from c and
f′(x) > 0 on an open interval extending right from c , then f
has a relative minimum at c .
If f′(x) has the same sign on both an open interval extending
left from c and an open interval extending right from c, thenf does not have a relative extremum at c .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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RELATIVE MAXIMA AND MINIMA
FIRST DERIVATIVE TEAT
If f′(x) > 0 on an open interval extending left from c and
f′(x) < 0 on an open interval extending right from c , then f
has a relative maximum at c .
If f′(x) < 0 on an open interval extending left from c and
f′(x) > 0 on an open interval extending right from c , then f
has a relative minimum at c .
If f′(x) has the same sign on both an open interval extending
left from c and an open interval extending right from c, thenf does not have a relative extremum at c .
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 232: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/232.jpg)
RELATIVE MAXIMA AND MINIMA
Imran Talib Faculty of Mathematics and Statistics (VU).
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RELATIVE MAXIMA AND MINIMA
Let f (x) = 3x4 − 4x3 − 12x2 + 3.
Differentiable everywhere on [−2.3] , with f′(x) = 0 for
x = −1, 0, 2.By first derivative test f has a relative maximum at x = 0 andrelative minima at x = −1 and x = 2.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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RELATIVE MAXIMA AND MINIMA
Let f (x) = 3x4 − 4x3 − 12x2 + 3.Differentiable everywhere on [−2.3] , with f
′(x) = 0 for
x = −1, 0, 2.
By first derivative test f has a relative maximum at x = 0 andrelative minima at x = −1 and x = 2.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 235: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/235.jpg)
RELATIVE MAXIMA AND MINIMA
Let f (x) = 3x4 − 4x3 − 12x2 + 3.Differentiable everywhere on [−2.3] , with f
′(x) = 0 for
x = −1, 0, 2.By first derivative test f has a relative maximum at x = 0 andrelative minima at x = −1 and x = 2.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 236: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/236.jpg)
RELATIVE MAXIMA AND MINIMA
Let f (x) = 3x4 − 4x3 − 12x2 + 3.Differentiable everywhere on [−2.3] , with f
′(x) = 0 for
x = −1, 0, 2.By first derivative test f has a relative maximum at x = 0 andrelative minima at x = −1 and x = 2.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 237: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/237.jpg)
RELATIVE MAXIMA AND MINIMA
Let f (x) = 3x4 − 4x3 − 12x2 + 3.Differentiable everywhere on [−2.3] , with f
′(x) = 0 for
x = −1, 0, 2.By first derivative test f has a relative maximum at x = 0 andrelative minima at x = −1 and x = 2.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 238: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/238.jpg)
RELATIVE MAXIMA AND MINIMA
SECOND DERIVATIVE TEAT
Let c is a critical point at which f′(c) = 0.
Let f′(x) exists in a neighborhood of c .
Let f′′(c) exists.
Then f has a relative maximum value at c if f′′(c) < 0,
and a relative minimum value at c if f′′(c) > 0 .
If f′′(c) = 0 , the test is not informative.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 239: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/239.jpg)
RELATIVE MAXIMA AND MINIMA
SECOND DERIVATIVE TEAT
Let c is a critical point at which f′(c) = 0.
Let f′(x) exists in a neighborhood of c .
Let f′′(c) exists.
Then f has a relative maximum value at c if f′′(c) < 0,
and a relative minimum value at c if f′′(c) > 0 .
If f′′(c) = 0 , the test is not informative.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 240: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/240.jpg)
RELATIVE MAXIMA AND MINIMA
SECOND DERIVATIVE TEAT
Let c is a critical point at which f′(c) = 0.
Let f′(x) exists in a neighborhood of c .
Let f′′(c) exists.
Then f has a relative maximum value at c if f′′(c) < 0,
and a relative minimum value at c if f′′(c) > 0 .
If f′′(c) = 0 , the test is not informative.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 241: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/241.jpg)
RELATIVE MAXIMA AND MINIMA
SECOND DERIVATIVE TEAT
Let c is a critical point at which f′(c) = 0.
Let f′(x) exists in a neighborhood of c .
Let f′′(c) exists.
Then f has a relative maximum value at c if f′′(c) < 0,
and a relative minimum value at c if f′′(c) > 0 .
If f′′(c) = 0 , the test is not informative.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 242: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/242.jpg)
RELATIVE MAXIMA AND MINIMA
SECOND DERIVATIVE TEAT
Let c is a critical point at which f′(c) = 0.
Let f′(x) exists in a neighborhood of c .
Let f′′(c) exists.
Then f has a relative maximum value at c if f′′(c) < 0,
and a relative minimum value at c if f′′(c) > 0 .
If f′′(c) = 0 , the test is not informative.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 243: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/243.jpg)
RELATIVE MAXIMA AND MINIMA
SECOND DERIVATIVE TEAT
Let c is a critical point at which f′(c) = 0.
Let f′(x) exists in a neighborhood of c .
Let f′′(c) exists.
Then f has a relative maximum value at c if f′′(c) < 0,
and a relative minimum value at c if f′′(c) > 0 .
If f′′(c) = 0 , the test is not informative.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 244: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/244.jpg)
RELATIVE MAXIMA AND MINIMA
SECOND DERIVATIVE TEAT
Let c is a critical point at which f′(c) = 0.
Let f′(x) exists in a neighborhood of c .
Let f′′(c) exists.
Then f has a relative maximum value at c if f′′(c) < 0,
and a relative minimum value at c if f′′(c) > 0 .
If f′′(c) = 0 , the test is not informative.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 245: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/245.jpg)
RELATIVE MAXIMA AND MINIMA
SECOND DERIVATIVE TEAT
Let c is a critical point at which f′(c) = 0.
Let f′(x) exists in a neighborhood of c .
Let f′′(c) exists.
Then f has a relative maximum value at c if f′′(c) < 0,
and a relative minimum value at c if f′′(c) > 0 .
If f′′(c) = 0 , the test is not informative.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 246: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/246.jpg)
RELATIVE MAXIMA AND MINIMA
SECOND DERIVATIVE TEAT
Let c is a critical point at which f′(c) = 0.
Let f′(x) exists in a neighborhood of c .
Let f′′(c) exists.
Then f has a relative maximum value at c if f′′(c) < 0,
and a relative minimum value at c if f′′(c) > 0 .
If f′′(c) = 0 , the test is not informative.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 247: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/247.jpg)
SINGULAR POINTS
A point on the curve at which the curve exhibits anextra-ordinary behavior is called a Singular Point.Mean to say where f
′(x) is not defined but f (x) is defined.
Points of inflection and multiple points are the types ofsingular points.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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SINGULAR POINTS
A point on the curve at which the curve exhibits anextra-ordinary behavior is called a Singular Point.
Mean to say where f′(x) is not defined but f (x) is defined.
Points of inflection and multiple points are the types ofsingular points.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 249: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/249.jpg)
SINGULAR POINTS
A point on the curve at which the curve exhibits anextra-ordinary behavior is called a Singular Point.Mean to say where f
′(x) is not defined but f (x) is defined.
Points of inflection and multiple points are the types ofsingular points.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 250: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/250.jpg)
SINGULAR POINTS
A point on the curve at which the curve exhibits anextra-ordinary behavior is called a Singular Point.Mean to say where f
′(x) is not defined but f (x) is defined.
Points of inflection and multiple points are the types ofsingular points.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 251: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/251.jpg)
SINGULAR POINTS
A point on the curve at which the curve exhibits anextra-ordinary behavior is called a Singular Point.Mean to say where f
′(x) is not defined but f (x) is defined.
Points of inflection and multiple points are the types ofsingular points.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 252: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/252.jpg)
SINGULAR POINTS
A point on the curve at which the curve exhibits anextra-ordinary behavior is called a Singular Point.Mean to say where f
′(x) is not defined but f (x) is defined.
Points of inflection and multiple points are the types ofsingular points.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 253: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/253.jpg)
SINGULAR POINTS
EXAMPLE
Discuss the singular points of f (x) = (x − 1)23 − 3(x − 1) on
[0, ∞].
Look for values x where f′(x) is not defined, but f (x) is
defined.
f′(x) = 2
3(x−1)13− 3.
Notice that the denominator is zero when x = 1, so thatf′(x) is not defined when x = 1, even though f (x) is defined
when x = 1.
Thus, we have a singular point at x = 1.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 254: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/254.jpg)
SINGULAR POINTS
EXAMPLE
Discuss the singular points of f (x) = (x − 1)23 − 3(x − 1) on
[0, ∞].
Look for values x where f′(x) is not defined, but f (x) is
defined.
f′(x) = 2
3(x−1)13− 3.
Notice that the denominator is zero when x = 1, so thatf′(x) is not defined when x = 1, even though f (x) is defined
when x = 1.
Thus, we have a singular point at x = 1.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 255: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/255.jpg)
SINGULAR POINTS
EXAMPLE
Discuss the singular points of f (x) = (x − 1)23 − 3(x − 1) on
[0, ∞].
Look for values x where f′(x) is not defined, but f (x) is
defined.
f′(x) = 2
3(x−1)13− 3.
Notice that the denominator is zero when x = 1, so thatf′(x) is not defined when x = 1, even though f (x) is defined
when x = 1.
Thus, we have a singular point at x = 1.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 256: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/256.jpg)
SINGULAR POINTS
EXAMPLE
Discuss the singular points of f (x) = (x − 1)23 − 3(x − 1) on
[0, ∞].
Look for values x where f′(x) is not defined, but f (x) is
defined.
f′(x) = 2
3(x−1)13− 3.
Notice that the denominator is zero when x = 1, so thatf′(x) is not defined when x = 1, even though f (x) is defined
when x = 1.
Thus, we have a singular point at x = 1.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 257: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/257.jpg)
SINGULAR POINTS
EXAMPLE
Discuss the singular points of f (x) = (x − 1)23 − 3(x − 1) on
[0, ∞].
Look for values x where f′(x) is not defined, but f (x) is
defined.
f′(x) = 2
3(x−1)13− 3.
Notice that the denominator is zero when x = 1, so thatf′(x) is not defined when x = 1, even though f (x) is defined
when x = 1.
Thus, we have a singular point at x = 1.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 258: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/258.jpg)
SINGULAR POINTS
EXAMPLE
Discuss the singular points of f (x) = (x − 1)23 − 3(x − 1) on
[0, ∞].
Look for values x where f′(x) is not defined, but f (x) is
defined.
f′(x) = 2
3(x−1)13− 3.
Notice that the denominator is zero when x = 1, so thatf′(x) is not defined when x = 1, even though f (x) is defined
when x = 1.
Thus, we have a singular point at x = 1.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 259: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/259.jpg)
SINGULAR POINTS
EXAMPLE
Discuss the singular points of f (x) = (x − 1)23 − 3(x − 1) on
[0, ∞].
Look for values x where f′(x) is not defined, but f (x) is
defined.
f′(x) = 2
3(x−1)13− 3.
Notice that the denominator is zero when x = 1, so thatf′(x) is not defined when x = 1, even though f (x) is defined
when x = 1.
Thus, we have a singular point at x = 1.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 260: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/260.jpg)
SINGULAR POINTS
EXAMPLE
Discuss the singular points of f (x) = (x − 1)23 − 3(x − 1) on
[0, ∞].
Look for values x where f′(x) is not defined, but f (x) is
defined.
f′(x) = 2
3(x−1)13− 3.
Notice that the denominator is zero when x = 1, so thatf′(x) is not defined when x = 1, even though f (x) is defined
when x = 1.
Thus, we have a singular point at x = 1.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 261: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/261.jpg)
SINGULAR POINTS
EXAMPLE
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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SINGULAR POINTS
EXAMPLE
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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SINGULAR POINTS
EXAMPLE
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 264: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/264.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through which more than one branch ofthe curve pass is called Multiple Point.
A Point on the curve through which two branches of the curvepass is called Double Point..
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 265: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/265.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through which more than one branch ofthe curve pass is called Multiple Point.
A Point on the curve through which two branches of the curvepass is called Double Point..
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 266: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/266.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through which more than one branch ofthe curve pass is called Multiple Point.
A Point on the curve through which two branches of the curvepass is called Double Point..
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 267: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/267.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through which more than one branch ofthe curve pass is called Multiple Point.
A Point on the curve through which two branches of the curvepass is called Double Point..
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 268: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/268.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through which more than one branch ofthe curve pass is called Multiple Point.
A Point on the curve through which two branches of the curvepass is called Double Point..
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 269: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/269.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through which more than one branch ofthe curve pass is called Multiple Point.
A Point on the curve through which two branches of the curvepass is called Double Point..
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 270: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/270.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through three branches of the curve passis called Triple Point.A Point on the curve through which r branch of the curvepass is called Multiple Point of rth order.A Double Point P on a curve is called a Node if two realbranches of a curve pass through P and two tangents at whichare real and different. Thus the point P shown is a Node.A Double Point Q on a curve is called a Cusp if two realbranches of a curve pass through Q and two tangents atwhich are real and coincident. Thus the point Q shown in theadjoining two figures is a Cusp.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 271: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/271.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through three branches of the curve passis called Triple Point.A Point on the curve through which r branch of the curvepass is called Multiple Point of rth order.A Double Point P on a curve is called a Node if two realbranches of a curve pass through P and two tangents at whichare real and different. Thus the point P shown is a Node.A Double Point Q on a curve is called a Cusp if two realbranches of a curve pass through Q and two tangents atwhich are real and coincident. Thus the point Q shown in theadjoining two figures is a Cusp.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 272: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/272.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through three branches of the curve passis called Triple Point.
A Point on the curve through which r branch of the curvepass is called Multiple Point of rth order.A Double Point P on a curve is called a Node if two realbranches of a curve pass through P and two tangents at whichare real and different. Thus the point P shown is a Node.A Double Point Q on a curve is called a Cusp if two realbranches of a curve pass through Q and two tangents atwhich are real and coincident. Thus the point Q shown in theadjoining two figures is a Cusp.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 273: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/273.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through three branches of the curve passis called Triple Point.A Point on the curve through which r branch of the curvepass is called Multiple Point of rth order.
A Double Point P on a curve is called a Node if two realbranches of a curve pass through P and two tangents at whichare real and different. Thus the point P shown is a Node.A Double Point Q on a curve is called a Cusp if two realbranches of a curve pass through Q and two tangents atwhich are real and coincident. Thus the point Q shown in theadjoining two figures is a Cusp.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 274: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/274.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through three branches of the curve passis called Triple Point.A Point on the curve through which r branch of the curvepass is called Multiple Point of rth order.A Double Point P on a curve is called a Node if two realbranches of a curve pass through P and two tangents at whichare real and different. Thus the point P shown is a Node.
A Double Point Q on a curve is called a Cusp if two realbranches of a curve pass through Q and two tangents atwhich are real and coincident. Thus the point Q shown in theadjoining two figures is a Cusp.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 275: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/275.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through three branches of the curve passis called Triple Point.A Point on the curve through which r branch of the curvepass is called Multiple Point of rth order.A Double Point P on a curve is called a Node if two realbranches of a curve pass through P and two tangents at whichare real and different. Thus the point P shown is a Node.A Double Point Q on a curve is called a Cusp if two realbranches of a curve pass through Q and two tangents atwhich are real and coincident. Thus the point Q shown in theadjoining two figures is a Cusp.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 276: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/276.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through three branches of the curve passis called Triple Point.A Point on the curve through which r branch of the curvepass is called Multiple Point of rth order.A Double Point P on a curve is called a Node if two realbranches of a curve pass through P and two tangents at whichare real and different. Thus the point P shown is a Node.A Double Point Q on a curve is called a Cusp if two realbranches of a curve pass through Q and two tangents atwhich are real and coincident. Thus the point Q shown in theadjoining two figures is a Cusp.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 277: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/277.jpg)
SINGULAR POINTS
DEFINITIONS
A Point on the curve through three branches of the curve passis called Triple Point.A Point on the curve through which r branch of the curvepass is called Multiple Point of rth order.A Double Point P on a curve is called a Node if two realbranches of a curve pass through P and two tangents at whichare real and different. Thus the point P shown is a Node.A Double Point Q on a curve is called a Cusp if two realbranches of a curve pass through Q and two tangents atwhich are real and coincident. Thus the point Q shown in theadjoining two figures is a Cusp.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 278: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/278.jpg)
SINGULAR POINTS
DEFINITIONS
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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SINGULAR POINTS
DEFINITIONS
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 280: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/280.jpg)
SINGULAR POINTS
DEFINITIONS
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 281: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/281.jpg)
SINGULAR POINTS
DEFINITIONS
A Double Point R on a curve is called a Conjugate Point orIsolated point if there exists no real points of the curve in theneighborhood of R.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
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SINGULAR POINTS
DEFINITIONS
A Double Point R on a curve is called a Conjugate Point orIsolated point if there exists no real points of the curve in theneighborhood of R.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 283: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/283.jpg)
SINGULAR POINTS
DEFINITIONS
A Double Point R on a curve is called a Conjugate Point orIsolated point if there exists no real points of the curve in theneighborhood of R.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 284: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/284.jpg)
SINGULAR POINTS
DEFINITIONS
A Double Point R on a curve is called a Conjugate Point orIsolated point if there exists no real points of the curve in theneighborhood of R.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 285: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/285.jpg)
SINGULAR POINTS
WORKING RULE FOR INVESTIGATING THE NATURE OF THE
DOUBLE POINT AT THE ORIGIN.
Find the tangents at the origin by equating to zero the lowestdegree terms present in the equation of the curve. If origin isa double point, then we shall get tangents real and imaginary.
If the two tangents at the origin are imaginary, then the originis a conjugate point.
If the two tangents at the origin are real and different, thenthe tangent is a node or a conjugate point.
If the two tangents at the origin are real and coincident, thenthe origin is a cusp or a conjugate point.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 286: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/286.jpg)
SINGULAR POINTS
WORKING RULE FOR INVESTIGATING THE NATURE OF THE
DOUBLE POINT AT THE ORIGIN.
Find the tangents at the origin by equating to zero the lowestdegree terms present in the equation of the curve. If origin isa double point, then we shall get tangents real and imaginary.
If the two tangents at the origin are imaginary, then the originis a conjugate point.
If the two tangents at the origin are real and different, thenthe tangent is a node or a conjugate point.
If the two tangents at the origin are real and coincident, thenthe origin is a cusp or a conjugate point.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 287: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/287.jpg)
SINGULAR POINTS
WORKING RULE FOR INVESTIGATING THE NATURE OF THE
DOUBLE POINT AT THE ORIGIN.
Find the tangents at the origin by equating to zero the lowestdegree terms present in the equation of the curve. If origin isa double point, then we shall get tangents real and imaginary.
If the two tangents at the origin are imaginary, then the originis a conjugate point.
If the two tangents at the origin are real and different, thenthe tangent is a node or a conjugate point.
If the two tangents at the origin are real and coincident, thenthe origin is a cusp or a conjugate point.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 288: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/288.jpg)
SINGULAR POINTS
WORKING RULE FOR INVESTIGATING THE NATURE OF THE
DOUBLE POINT AT THE ORIGIN.
Find the tangents at the origin by equating to zero the lowestdegree terms present in the equation of the curve. If origin isa double point, then we shall get tangents real and imaginary.
If the two tangents at the origin are imaginary, then the originis a conjugate point.
If the two tangents at the origin are real and different, thenthe tangent is a node or a conjugate point.
If the two tangents at the origin are real and coincident, thenthe origin is a cusp or a conjugate point.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 289: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/289.jpg)
SINGULAR POINTS
WORKING RULE FOR INVESTIGATING THE NATURE OF THE
DOUBLE POINT AT THE ORIGIN.
Find the tangents at the origin by equating to zero the lowestdegree terms present in the equation of the curve. If origin isa double point, then we shall get tangents real and imaginary.
If the two tangents at the origin are imaginary, then the originis a conjugate point.
If the two tangents at the origin are real and different, thenthe tangent is a node or a conjugate point.
If the two tangents at the origin are real and coincident, thenthe origin is a cusp or a conjugate point.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 290: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/290.jpg)
SINGULAR POINTS
WORKING RULE FOR INVESTIGATING THE NATURE OF THE
DOUBLE POINT AT THE ORIGIN.
Find the tangents at the origin by equating to zero the lowestdegree terms present in the equation of the curve. If origin isa double point, then we shall get tangents real and imaginary.
If the two tangents at the origin are imaginary, then the originis a conjugate point.
If the two tangents at the origin are real and different, thenthe tangent is a node or a conjugate point.
If the two tangents at the origin are real and coincident, thenthe origin is a cusp or a conjugate point.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 291: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/291.jpg)
SINGULAR POINTS
REMARK.
To study the nature of the curve near origin
If the tangents at the origin are y2 = 0, solve the equation ofthe curve for y , neglecting all terms of y having powers abovesecond. If for small non zero values of x , the values of y arereal, then the branches of the curve through the origin arealso real, otherwise they are imaginary.
If the tangents at the origin are x2 = 0, solve the givenequation of the curve for x instead of y and proceed asmentioned in the above point.
In other cases, solve for y or x , whichever is convenient.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 292: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/292.jpg)
SINGULAR POINTS
REMARK.
To study the nature of the curve near origin
If the tangents at the origin are y2 = 0, solve the equation ofthe curve for y , neglecting all terms of y having powers abovesecond. If for small non zero values of x , the values of y arereal, then the branches of the curve through the origin arealso real, otherwise they are imaginary.
If the tangents at the origin are x2 = 0, solve the givenequation of the curve for x instead of y and proceed asmentioned in the above point.
In other cases, solve for y or x , whichever is convenient.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 293: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/293.jpg)
SINGULAR POINTS
REMARK.
To study the nature of the curve near origin
If the tangents at the origin are y2 = 0, solve the equation ofthe curve for y , neglecting all terms of y having powers abovesecond. If for small non zero values of x , the values of y arereal, then the branches of the curve through the origin arealso real, otherwise they are imaginary.
If the tangents at the origin are x2 = 0, solve the givenequation of the curve for x instead of y and proceed asmentioned in the above point.
In other cases, solve for y or x , whichever is convenient.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 294: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/294.jpg)
SINGULAR POINTS
REMARK.
To study the nature of the curve near origin
If the tangents at the origin are y2 = 0, solve the equation ofthe curve for y , neglecting all terms of y having powers abovesecond. If for small non zero values of x , the values of y arereal, then the branches of the curve through the origin arealso real, otherwise they are imaginary.
If the tangents at the origin are x2 = 0, solve the givenequation of the curve for x instead of y and proceed asmentioned in the above point.
In other cases, solve for y or x , whichever is convenient.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 295: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/295.jpg)
SINGULAR POINTS
REMARK.
To study the nature of the curve near origin
If the tangents at the origin are y2 = 0, solve the equation ofthe curve for y , neglecting all terms of y having powers abovesecond. If for small non zero values of x , the values of y arereal, then the branches of the curve through the origin arealso real, otherwise they are imaginary.
If the tangents at the origin are x2 = 0, solve the givenequation of the curve for x instead of y and proceed asmentioned in the above point.
In other cases, solve for y or x , whichever is convenient.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 296: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/296.jpg)
SINGULAR POINTS
REMARK.
Conditions for the existence of Multiple Points
For Multiple Points of the curve f (x , y) = 0, ∂f∂x = 0 and
∂f∂y = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 297: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/297.jpg)
SINGULAR POINTS
REMARK.
Conditions for the existence of Multiple Points
For Multiple Points of the curve f (x , y) = 0, ∂f∂x = 0 and
∂f∂y = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 298: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/298.jpg)
SINGULAR POINTS
REMARK.
Conditions for the existence of Multiple Points
For Multiple Points of the curve f (x , y) = 0, ∂f∂x = 0 and
∂f∂y = 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 299: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/299.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = x3 + y3 − 3xy
According to the last discussions, the tangents at the originare x = 0 and y = 0
Hence the origin is either a node or isolated point.
When x is so small, the equation of the curve is y2 = 3xwhich represent two real branches through the origin.
Hence the origin is a node.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 300: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/300.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = x3 + y3 − 3xy
According to the last discussions, the tangents at the originare x = 0 and y = 0
Hence the origin is either a node or isolated point.
When x is so small, the equation of the curve is y2 = 3xwhich represent two real branches through the origin.
Hence the origin is a node.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 301: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/301.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = x3 + y3 − 3xy
According to the last discussions, the tangents at the originare x = 0 and y = 0
Hence the origin is either a node or isolated point.
When x is so small, the equation of the curve is y2 = 3xwhich represent two real branches through the origin.
Hence the origin is a node.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 302: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/302.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = x3 + y3 − 3xy
According to the last discussions, the tangents at the originare x = 0 and y = 0
Hence the origin is either a node or isolated point.
When x is so small, the equation of the curve is y2 = 3xwhich represent two real branches through the origin.
Hence the origin is a node.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 303: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/303.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = x3 + y3 − 3xy
According to the last discussions, the tangents at the originare x = 0 and y = 0
Hence the origin is either a node or isolated point.
When x is so small, the equation of the curve is y2 = 3xwhich represent two real branches through the origin.
Hence the origin is a node.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 304: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/304.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = x3 + y3 − 3xy
According to the last discussions, the tangents at the originare x = 0 and y = 0
Hence the origin is either a node or isolated point.
When x is so small, the equation of the curve is y2 = 3xwhich represent two real branches through the origin.
Hence the origin is a node.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 305: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/305.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = x3 + y3 − 3xy
According to the last discussions, the tangents at the originare x = 0 and y = 0
Hence the origin is either a node or isolated point.
When x is so small, the equation of the curve is y2 = 3xwhich represent two real branches through the origin.
Hence the origin is a node.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 306: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/306.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = x3 + y3 − 3xy
According to the last discussions, the tangents at the originare x = 0 and y = 0
Hence the origin is either a node or isolated point.
When x is so small, the equation of the curve is y2 = 3xwhich represent two real branches through the origin.
Hence the origin is a node.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 307: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/307.jpg)
SINGULAR POINTS
EXAMPLE
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 308: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/308.jpg)
SINGULAR POINTS
EXAMPLE
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 309: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/309.jpg)
SINGULAR POINTS
EXAMPLE
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 310: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/310.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = (x2 + y2)(2a− x)− b2x .
According to the last discussions, the tangents at the originare x = 0.
Hence the origin is either a cusp or isolated point.
To see whether the origin is a cusp or an isolated point. Solvethe equation of a curve for x .
By neglecting y2, the equation of the curve can also bewritten as
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 311: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/311.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = (x2 + y2)(2a− x)− b2x .
According to the last discussions, the tangents at the originare x = 0.
Hence the origin is either a cusp or isolated point.
To see whether the origin is a cusp or an isolated point. Solvethe equation of a curve for x .
By neglecting y2, the equation of the curve can also bewritten as
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 312: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/312.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = (x2 + y2)(2a− x)− b2x .
According to the last discussions, the tangents at the originare x = 0.
Hence the origin is either a cusp or isolated point.
To see whether the origin is a cusp or an isolated point. Solvethe equation of a curve for x .
By neglecting y2, the equation of the curve can also bewritten as
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 313: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/313.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = (x2 + y2)(2a− x)− b2x .
According to the last discussions, the tangents at the originare x = 0.
Hence the origin is either a cusp or isolated point.
To see whether the origin is a cusp or an isolated point. Solvethe equation of a curve for x .
By neglecting y2, the equation of the curve can also bewritten as
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 314: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/314.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = (x2 + y2)(2a− x)− b2x .
According to the last discussions, the tangents at the originare x = 0.
Hence the origin is either a cusp or isolated point.
To see whether the origin is a cusp or an isolated point. Solvethe equation of a curve for x .
By neglecting y2, the equation of the curve can also bewritten as
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 315: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/315.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = (x2 + y2)(2a− x)− b2x .
According to the last discussions, the tangents at the originare x = 0.
Hence the origin is either a cusp or isolated point.
To see whether the origin is a cusp or an isolated point. Solvethe equation of a curve for x .
By neglecting y2, the equation of the curve can also bewritten as
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 316: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/316.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = (x2 + y2)(2a− x)− b2x .
According to the last discussions, the tangents at the originare x = 0.
Hence the origin is either a cusp or isolated point.
To see whether the origin is a cusp or an isolated point. Solvethe equation of a curve for x .
By neglecting y2, the equation of the curve can also bewritten as
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 317: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/317.jpg)
SINGULAR POINTS
EXAMPLE
Determine the nature of the singular point (0, 0) off (x , y) = (x2 + y2)(2a− x)− b2x .
According to the last discussions, the tangents at the originare x = 0.
Hence the origin is either a cusp or isolated point.
To see whether the origin is a cusp or an isolated point. Solvethe equation of a curve for x .
By neglecting y2, the equation of the curve can also bewritten as
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 318: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/318.jpg)
SINGULAR POINTS
EXAMPLE
−x3 − b2x + 2ax2 = 0
x2 − 2ax + b2 =
x =2a±√
4a2−4(1)(b2)2
x = a±√a2 − b2.
Hence origin is a cusp if a2 − b2 > 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 319: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/319.jpg)
SINGULAR POINTS
EXAMPLE
−x3 − b2x + 2ax2 = 0
x2 − 2ax + b2 =
x =2a±√
4a2−4(1)(b2)2
x = a±√a2 − b2.
Hence origin is a cusp if a2 − b2 > 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 320: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/320.jpg)
SINGULAR POINTS
EXAMPLE
−x3 − b2x + 2ax2 = 0
x2 − 2ax + b2 =
x =2a±√
4a2−4(1)(b2)2
x = a±√a2 − b2.
Hence origin is a cusp if a2 − b2 > 0.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 321: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/321.jpg)
SINGULAR POINTS
EXAMPLE
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 322: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/322.jpg)
SINGULAR POINTS
EXAMPLE
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 323: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/323.jpg)
SINGULAR POINTS
EXAMPLE
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 324: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/324.jpg)
SINGULAR POINTS
WORKING RULES TO CALCULATE SINGULAR POINTS AND ITS
NATURE USING PARTIAL DERIVATIVES
If f (x , y) be a curve then its singular points are thesimultaneous solutions of f (x , y) = 0, fx (x , y) = 0 andfy (x , y) = 0.The values of tangents at singular points are the roots offyy (y
′(x))2 + 2fxyy
′(x) + fxx = 0.
If fxx , fxy and fyy are not all zero then the point (x , y) will bea double point.If (fxy )2 − fxx fyy > 0 the point (x , y) would be a node.If (fxy )2 − fxx fyy = 0 the point (x , y) would be a cusp.If (fxy )2 − fxx fyy < 0 the point (x , y) would be an isolatedpoint.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 325: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/325.jpg)
SINGULAR POINTS
WORKING RULES TO CALCULATE SINGULAR POINTS AND ITS
NATURE USING PARTIAL DERIVATIVES
If f (x , y) be a curve then its singular points are thesimultaneous solutions of f (x , y) = 0, fx (x , y) = 0 andfy (x , y) = 0.The values of tangents at singular points are the roots offyy (y
′(x))2 + 2fxyy
′(x) + fxx = 0.
If fxx , fxy and fyy are not all zero then the point (x , y) will bea double point.If (fxy )2 − fxx fyy > 0 the point (x , y) would be a node.If (fxy )2 − fxx fyy = 0 the point (x , y) would be a cusp.If (fxy )2 − fxx fyy < 0 the point (x , y) would be an isolatedpoint.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 326: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/326.jpg)
SINGULAR POINTS
WORKING RULES TO CALCULATE SINGULAR POINTS AND ITS
NATURE USING PARTIAL DERIVATIVES
If f (x , y) be a curve then its singular points are thesimultaneous solutions of f (x , y) = 0, fx (x , y) = 0 andfy (x , y) = 0.
The values of tangents at singular points are the roots offyy (y
′(x))2 + 2fxyy
′(x) + fxx = 0.
If fxx , fxy and fyy are not all zero then the point (x , y) will bea double point.If (fxy )2 − fxx fyy > 0 the point (x , y) would be a node.If (fxy )2 − fxx fyy = 0 the point (x , y) would be a cusp.If (fxy )2 − fxx fyy < 0 the point (x , y) would be an isolatedpoint.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 327: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/327.jpg)
SINGULAR POINTS
WORKING RULES TO CALCULATE SINGULAR POINTS AND ITS
NATURE USING PARTIAL DERIVATIVES
If f (x , y) be a curve then its singular points are thesimultaneous solutions of f (x , y) = 0, fx (x , y) = 0 andfy (x , y) = 0.The values of tangents at singular points are the roots offyy (y
′(x))2 + 2fxyy
′(x) + fxx = 0.
If fxx , fxy and fyy are not all zero then the point (x , y) will bea double point.If (fxy )2 − fxx fyy > 0 the point (x , y) would be a node.If (fxy )2 − fxx fyy = 0 the point (x , y) would be a cusp.If (fxy )2 − fxx fyy < 0 the point (x , y) would be an isolatedpoint.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 328: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/328.jpg)
SINGULAR POINTS
WORKING RULES TO CALCULATE SINGULAR POINTS AND ITS
NATURE USING PARTIAL DERIVATIVES
If f (x , y) be a curve then its singular points are thesimultaneous solutions of f (x , y) = 0, fx (x , y) = 0 andfy (x , y) = 0.The values of tangents at singular points are the roots offyy (y
′(x))2 + 2fxyy
′(x) + fxx = 0.
If fxx , fxy and fyy are not all zero then the point (x , y) will bea double point.
If (fxy )2 − fxx fyy > 0 the point (x , y) would be a node.If (fxy )2 − fxx fyy = 0 the point (x , y) would be a cusp.If (fxy )2 − fxx fyy < 0 the point (x , y) would be an isolatedpoint.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 329: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/329.jpg)
SINGULAR POINTS
WORKING RULES TO CALCULATE SINGULAR POINTS AND ITS
NATURE USING PARTIAL DERIVATIVES
If f (x , y) be a curve then its singular points are thesimultaneous solutions of f (x , y) = 0, fx (x , y) = 0 andfy (x , y) = 0.The values of tangents at singular points are the roots offyy (y
′(x))2 + 2fxyy
′(x) + fxx = 0.
If fxx , fxy and fyy are not all zero then the point (x , y) will bea double point.If (fxy )2 − fxx fyy > 0 the point (x , y) would be a node.
If (fxy )2 − fxx fyy = 0 the point (x , y) would be a cusp.If (fxy )2 − fxx fyy < 0 the point (x , y) would be an isolatedpoint.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 330: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/330.jpg)
SINGULAR POINTS
WORKING RULES TO CALCULATE SINGULAR POINTS AND ITS
NATURE USING PARTIAL DERIVATIVES
If f (x , y) be a curve then its singular points are thesimultaneous solutions of f (x , y) = 0, fx (x , y) = 0 andfy (x , y) = 0.The values of tangents at singular points are the roots offyy (y
′(x))2 + 2fxyy
′(x) + fxx = 0.
If fxx , fxy and fyy are not all zero then the point (x , y) will bea double point.If (fxy )2 − fxx fyy > 0 the point (x , y) would be a node.If (fxy )2 − fxx fyy = 0 the point (x , y) would be a cusp.
If (fxy )2 − fxx fyy < 0 the point (x , y) would be an isolatedpoint.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 331: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/331.jpg)
SINGULAR POINTS
WORKING RULES TO CALCULATE SINGULAR POINTS AND ITS
NATURE USING PARTIAL DERIVATIVES
If f (x , y) be a curve then its singular points are thesimultaneous solutions of f (x , y) = 0, fx (x , y) = 0 andfy (x , y) = 0.The values of tangents at singular points are the roots offyy (y
′(x))2 + 2fxyy
′(x) + fxx = 0.
If fxx , fxy and fyy are not all zero then the point (x , y) will bea double point.If (fxy )2 − fxx fyy > 0 the point (x , y) would be a node.If (fxy )2 − fxx fyy = 0 the point (x , y) would be a cusp.If (fxy )2 − fxx fyy < 0 the point (x , y) would be an isolatedpoint.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System
![Page 332: Graphs in Rectangular Coordinates System (23... · 2015-07-02 · INTRODUCTION French mathematician and philosopher Rene Descartes (1596-1650) devised a simple plan whereby two number](https://reader034.fdocuments.us/reader034/viewer/2022042417/5f3301e34ed9e06120468d7e/html5/thumbnails/332.jpg)
SINGULAR POINTS
WORKING RULES TO CALCULATE SINGULAR POINTS AND ITS
NATURE USING PARTIAL DERIVATIVES
If f (x , y) be a curve then its singular points are thesimultaneous solutions of f (x , y) = 0, fx (x , y) = 0 andfy (x , y) = 0.The values of tangents at singular points are the roots offyy (y
′(x))2 + 2fxyy
′(x) + fxx = 0.
If fxx , fxy and fyy are not all zero then the point (x , y) will bea double point.If (fxy )2 − fxx fyy > 0 the point (x , y) would be a node.If (fxy )2 − fxx fyy = 0 the point (x , y) would be a cusp.If (fxy )2 − fxx fyy < 0 the point (x , y) would be an isolatedpoint.
Imran Talib Faculty of Mathematics and Statistics (VU).
Graphs in Rectangular Coordinates System