Detail what is asked by referencing all the elementary results used. Determine the local/global extremes of f(x,y) = x2 + xy + y2  over D= {(x,y) ∈ R2, |x| ≤ 3 and x2 ≤ y ≤ 9}.

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Q: Find all local extrema of the function f: R? → R, f(x, y) = x³ + y³ + 3xy.

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Q: ponit) Let f(x)dx = 4, f(x)dx = 5, f(x)dx = 5. Find f(x)dx = and (4f(x) – 5)dx = %3D

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