Let D be the image of R = [1, 4] [1, 4] under the map (u,

Let D be the image of R = [1, 4] × [1, 4] under the map Φ(u, v) = (u2/v, v2/u).
(a) Compute Jac(Φ).
(b) Sketch D.
(c) Use the Change of Variables Formula to compute Area(D) and 

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f(x,y) dx dy, where f(x,y) = x + y.