Consider F and C below. F(x, у) 3 х2 і + у? ј C is the arc of the parabola y = 2x² from (1, 2) to (2, 8) (a) Find a function f such that F = Vf. f(x, y) 3 (,? + x*) %D (b) Use part (a) to evaluate Vf• dr along the given curve C. 171

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