Question: Please don't copy ans Problem 4. (Convex functions.) For each of the following functions determine whether it is convex, concave, or neither (and say why).

Please don't copy ans

Problem 4. (Convex functions.) For each of the following functions determine whether it is convex, concave, or neither (and say why). Hint: Compute the Hessian first. a. f(x1, X2) = 2122 on R3 b. f(1, 12) = 21/X2 on R2

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