Question: Let where x > 0, y > 0. How do you know that f must have a minimum in the region x > 0, y

Let


f(x, y) 12 X + 18 y + xy,


where x > 0, y > 0. How do you know that f must have a minimum in the region x > 0, y > 0? Find the minimum.

f(x, y) 12 X + 18 y + xy,

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