Question: 3. Let the joint probability density function of random variables X and Y be f (x, y) = 3x3 + xy 3

3. Let the joint probability density function of random variables X and Y be f (x, y) =    3x3 + xy 3 if 0 ≤ x ≤ 1, 0 ≤ y ≤ 2 0 elsewhere. Find E(X2 + 2XY ).

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