Question: 9. Evaluate (x' -2y')dr + (2y -2ry)dy, where C' is the path along the semicircle y = v4- x2 from (2, 0) to (-2,0) and

9. Evaluate (x' -2y')dr + (2y -2ry)dy, where C' is the

path along the semicircle y = v4- x2 from (2, 0) to

9. Evaluate (x' -2y')dr + (2y -2ry)dy, where C' is the path along the semicircle y = v4- x2 from (2, 0) to (-2,0) and then back along the r-axis

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