Find f, and f, and evaluate each at the given point. y' ху f(x, y) = (5, –5) 1. X - y' fa(X, y) 5,(x, V) = f,(5, -5) = f,(5, -5) =

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A: I have used partial differentiation

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A: Please refer to the image below.

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Q: 5)Let f ( x ) =3x4 + 4x3 Find the derivative. b)Find the critical numbers.

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