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Transcript of prova1_S1_2014
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Gabarito - Prova P 1 de Métodos de Cálculo 2 - Fatec - 1S 2014
Prof. Dr. Cláudio S. Sartori
Questão 4 - Determine as Integrais indefinidas:
2 Sinx 3 Cosx x x
x2
2 2 Cosx 3 Sinx
Expx 2x x
x
2x
Log2
3 x5
8 x3 1
x4 x
1
3 x3
3 x2
2 8 Logx
x
1 4 x2 x
1
8Log1 4 x2
Questão 5 - Determine as integrais definidas:
2
1x2 3 x x
15
2
0
Π
2 Sin2 x Cosx x
2
Sin2 x x
1
2Cos2 x
0
Π
2
Sin2 x x
1
Cosx x
Sinx
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0
Π
2
Cosx x
1
Questão 2 - (a) Taxa de Variação no Ponto (1,1,-2) na direção u
= - 2i + 3 j
- 6k
de:
T(x,y,z) =20
1 x 22 y 23 z 2
T
20
1 x 2
2 y 2
3 z 2
20
1 x2 2 y2
3 z2
x
20
1 x2 2 y2
3 z2, y
20
1 x2 2 y2
3 z2, z
20
1 x2 2 y2
3 z2
40 x
1 x2 2 y2
3 z22 ,
80 y
1 x2 2 y2
3 z22 ,
120 z
1 x2 2 y2
3 z22
T
u
T.u
u 2, 3, 6 2, 3, 6
Normalizeu
2
7,
3
7,
6
7
x0 1
y0 1
z0 2
1
1
2
GradTP 40 x0 1 x02
2 y02
3 z022
,
80 y0 1 x02
2 y02
3 z022
, 120 z0 1 x02
2 y02
3 z022
5
32,
5
16,
15
16
DotGradTP.Normalizeu
25
28
NDotGradTP.Normalizeu 0.892857
2 rova1_S1_2014.nb
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Norm GradTP5 41
32
T
u
T N Norm GradTP1.00049
Questão 3 - f(x,y)= x 4 y 3 2 x 2+27y
f x 4
y 3
2 x 2
27 y
2 x2 x4
27 y y3
x f
4 x 4 x3
y f
27 3 y2
Solve 4 x 4 x3 0 && 27 3 y2
0, x, yx 1, y 3, x 0, y 3, x 1, y 3,
x 1, y 3, x 0, y 3, x 1, y 3
D Det x,x f x,y f
y,x f y,y f
24 y
72 x
2
y
Fpi xi4
yi3
2 xi2
27 yi
55
Dxx x,x f
4 12 x2
Dxxpi 4 12 xi2
8
DPi "
delta
"
delta
prova1_S1_2014.nb 3
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x0 "xi"
y0 "yi"
Fp0 "func"
xi
yi
func
delta
2 f
x2
Classificação do Ponto Pxi,yi
x1 1
1
y1 3
3
Fp1 x14
y13
2 x12
27 y1
55
DP1 24 y1 72 x12 y1
144
Dxxp1 4 12 x12
8
Critico1 "minimo relativo"
minimo relativo
x2 0
0
y2 3
3
Fp2 x24
y23
2 x22
27 y2
54
DP2 24 y2 72 x22 y2
72
Dxxp2 4 12 x22
4
Critico2 "ponto de sela"
ponto de sela
4 rova1_S1_2014.nb
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x3 1
1
y3 3
3
Fp3 x34
y33
2 x32
27 y3
55
DP3 24 y3 72 x32 y3
144
Dxxp3 4 12 x32
8
Critico3 "mínimo relativo"
mínimo relativo
x4 1
1
y4 3
3
Fp4 x44
y43
2 x42
27 y4
53
DP4 24 y4 72 x42 y4
144
Dxxp4 4 12 x42
8
Critico4 "ponto de sela"
ponto de sela
x5 1
1
y5 3
3
Fp5 x54
y53
2 x52
27 y5
53
DP5 24 y5 72 x52 y5
144
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Dxxp5 4 12 x52
8
Critico5 "ponto de sela"
ponto de sela
x6 1
1
y6 3
3
Fp6 x64
y63
2 x62
27 y6
55
DP6
24 y6
72 x6
2 y6
144
Dxxp6 4 12 x62
8
Critico6 "mínimo relativo"
mínimo relativo
Tablexi, yi, Fpi, DPi, Dxxpi, Criticoi, i, 0, 6
x
i, y
i, func, 24 y
i 72 x
i
2 yi0
,
2 f
x2, Classificação do Ponto P
x
i,y
i,
1, 3, 55, 72, 8, ponto de sela, 0, 3, 54, 722, 4, ponto de sela,
1, 3, 55, 144, 8, mínimo relativo, 1, 3, 53, 1444, 8, ponto de sela,
1, 3, 53, 1445, 8, ponto de sela, 1, 3, 55, 144, 8, mínimo relativo
MatrixForm Tablexi, yi, Fpi, DPi, Dxxpi, Criticoi, i, 0, 6xi yi func 24 yi 72 xi
2 yi0
2 f
x2 Classificação do Ponto Pxi,yi
1 3 55 72 8 ponto de sela
0 3 54 722 4 ponto de sela
1 3 55 144 8 mínimo relativo
1 3 53 1444 8 ponto de sela
1 3 53 1445 8 ponto de sela
1 3 55 144 8 mínimo relativo
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Plot3Dx 4 y 3
2 x 2
27 y , x, 5, 5, y, 5, 5,
AxesLabel "x", "y", "z", PlotRange 55, 126
5
0
5
x
5
0
5
y 50
0
50
100
z
Questão 1 - Encontre as derivadas parciais:
x 5 x3 y4 2 x2 y
4 x y 15 x2 y4
y 5 x3 y4 2 x2 y
2 x2 20 x3 y3
x x2 y2
z23
2 x
3 x2 y2
z223
x x2 y2 Exp x y2
2 x y2
x x y2
y2 x2 y2
y x2 y2 Exp x y2
2 x y2
y 2 x y2
x y x2 y2
x,y 3 x2 4 y2
Sinx y CosyCosx y x y Sinx y
prova1_S1_2014.nb 7