sigma notation
-
Upload
leandra-shepard -
Category
Documents
-
view
33 -
download
3
description
Transcript of sigma notation
You should be able to…
Express a series using sigma notation. Expand and evaluate an expression
written in sigma notation.
A Greek letter - in maths it translates as “the sum of”
start term r=1
end term r=5
the sum of the first 5 terms
What type of series is it?
Make r=1, r=2, ....
r=1, 4-1=3
r=2, 8-1=7r=3, 12-1=11
3, 7, 11, ....
AP: u1=3, d=4, n=5
=55
Find the following information:
1. Type of series (AP or GP)
2. n
3. u1
4. difference (d) or ratio (r)
5. The sum
1. 8, 16, 32, .... a GP
2. n=6 (careful .. use your fingers to count)
3. u1 = 8
4. r = 2
5. 504
Solve each of the following sums
1. GP: 265680
2. AP: 858
3. GP: 1023
4. GP: 315012 (approx.)
5. AP: 102.5
6. AP: 10400
You should know…
The Greek letter is used to denote the sum of the terms of a series.
To express a series using sigma notation, use the
form (general term).
For example,
GDC
Use the sum and sequence functions to evaluate expressions written in sigma notation. For example, to observe the terms of the arithmetic sequence:
and to evaluate its sum, we could use the following