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Question 39
Let F(x,y,z) =exi+xezj+xsinπy2k,r(t) =costi+sintj+tk,0≤t≤2π\mathbf { F } ( x , y , z ) = e ^ { x } \mathbf { i } + x e ^ { z } \mathbf { j } + x \sin \pi y ^ { 2 } \mathbf { k } , \mathbf { r } ( t ) = \cos t \mathbf { i } + \sin t \mathbf { j } + t \mathbf { k } , 0 \leq t \leq 2 \piF(x,y,z) =exi+xezj+xsinπy2k,r(t) =costi+sintj+tk,0≤t≤2π . Then ∫\int ∫ C F∙dr\mathbf { F } \bullet d \mathbf { r }F∙dr is
A) 3(e2π+1) 5\frac { 3 \left( e ^ { 2 \pi } + 1 \right) } { 5 }53(e2π+1) B) 3(e2π−1) 5\frac { 3 \left( e ^ { 2 \pi } - 1 \right) } { 5 }53(e2π−1) C) −3(e2π−1) 5- \frac { 3 \left( e ^ { 2 \pi } - 1 \right) } { 5 }−53(e2π−1) D) −3(e2π+1) 5- \frac { 3 \left( e ^ { 2 \pi } + 1 \right) } { 5 }−53(e2π+1) E) 2(e2π−1) 5\frac { 2 \left( e ^ { 2 \pi } - 1 \right) } { 5 }52(e2π−1)
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