question 7 math 1
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Math 1TRANSCRIPT
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Q7-
div. V= 2x + 1 + 2z
∭00 0
2π 22−rcosθ
2rcosθ+1+2 z dz rdr dθ
∬0 0
2π 2
2 r2 cosθz+rz+r z2 2−rcosθ0
dr dθ
∬0 0
2π 2
2 r2 cosθ(2−rcosθ)+r (2−rcosθ )+r (2−rcosθ )2dr dθ
∬0 0
2π 2
4 r2 cosθ−2r3 co s2θ+2 r−r2cosθ+4 r−4 r2 cosθ+r2co s2θdr dθ
∬0 0
2π 2
6 r−2r3 co s2θ−r2 cosθ+r2 co s2θdr dθ
∫0
2π
3 r2− r4
2cos2θ− r
3
3cosθ+ r
3
3co s2θ2
0dθ
∫0
2π
12−8co s2θ−83cosθ+ 8
3co s2θdθ
∫0
2π
12−4(1+cos2θ)−83cosθ+ 4
3(1+cos2θ )dθ
(12−83θ−4
3sin 2θ−8
3sinθ)2π
0=(24 π−16
3π−0−0)
¿ 56π3