Calculate the flow in the field F along the path C. F = (x - y) i - (x 2 + y 2) j; C is curve from (4, 0) to (-4, 0) on the upper half of the circle x 2 + y 2 = 16 Hint: use the  parametric equation: x = 4 cost and y = 4sint and t is between 0 and Pi, since it is only the upper part of the circle.   a) (16pi-1)/4   b) - 8π   c) 16π   d) 8π

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Chapter2: Second-order Linear Odes
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Calculate the flow in the field F along the path C.

F = (x - y) i - (x 2 + y 2) j; C is curve from (4, 0) to (-4, 0) on the upper half of the circle x 2 + y 2 = 16 Hint: use the 
parametric equation: x = 4 cost and y = 4sint and t is between 0 and Pi, since it is only the upper part of the circle.
  a)
(16pi-1)/4
  b)
- 8π
  c)
16π
  d)
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