Show F(x,y)=

(1 point) Show F(x, y) = (6xy)+ 4)i+ (9x212 + 202x)j is conservative by finding a potential function f for F, and use f to compute - F . dr, where C is the curve given by r(1) = 2 sin fi + - sin10 5tj for 0 S t S x/2. f (x, y) = F . dr =