1. Let f(x, y) = y³ + x³ - 2y² - 3x + 30y. (a) Find all the critical points of f. (b) Determine whether f has a relative maximum, a relative minimum, or a saddle point at each critical point obtained in (a).

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A: Topic:- calculus

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A: Use limit concept

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A: We can solve the given problem by using the midpoint sum rule.

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