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Let f(x, y) = xy' + 2xy + 2ys (a) Find fx . (b) Find fy Let f (x, y) = xy3 + 2x3y +

Let f(x, y) = xy' + 2xy + 2ys (a) Find fx . (b) Find fy

Let f (x, y) = xy3 + 2x3y + 2y5 (a) Find fx . (b) Find .

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