Use the total differential to approximate the change in a function of two variables. Find the differential of the function f(x, y) = 5x² + 4xy - 6y2 at the point (-3, 3) using Az = 0.3 a Ay = -0.15 .

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Q: 9-14 Find the intervals on which f is increasing or decreasing, and find the local maximum and…

A: As per bartleby guidelines we only give first question answer. Please repost for other parts.

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Q: Find the derivative

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Q: the

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Q: 39-52 (a) Find the intervals of increase or decrease. (b) Find the local maximum and minimum values.…

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Q: 7. f(x) = 0.2 sin²x - cos 2x, 0≤x≤ T

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