Absolute Max&Min in R^3

Question

Find the absolute maximum and minimum values of f on the set D. f(x, y) = xy2 + 9, D = {(x, y) | x ≥ 0, y ≥ 0, x2 + y2 ≤ 3}


This is a chegg question, but I don't have access to that website.

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