A) Find and classify the critical points of f(z, y) = x³ + y3 – 6y? – 3.x + 9 using the first and second derivative tests.

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A: Topic = Functions

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A:

Q: Q1// B :-find and sketch the Domain of f(x,y)=v(x-4)+y -9 + 4-x-y

A: Let's find.

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A: Give examples of calculus in general economics.

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A:

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