Question: Exercise 7 . Find the work done by the force field F = y i - 2 x j along the upper semicircle { x

Exercise 7. Find the work done by the force field F=yi-2xj along the upper semicircle {x2+y2=9,y0}, oriented in the counterclockwise direction.
Exercise 8. Consider the vector field F=(2x-y)i-xj.
Determine whether or not F is a conservative vector field.
If it is, find a function f such that F=gradf.
Compute the line integral CF.dr, where C is the line segment from (1,2) to (2,1).
SOLVE BOTH EXERCISE FOR CALCLUS3 PLEASE
Exercise 7 . Find the work done by the force

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