Region D of the (x, y)-plane is the locus of points satisfying the conditions 2y > e-≥y and y ≤ e²/2 ≤2y (a) Sketch and identify region D in the (x, y)-plane. (b) Calculate the Jacobian of the transformation x=log (u²/3¹/3) y=u¹/³-1/3,

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