Question: Assume that all the given functions have continuous second-order partial derivatives. If z = f (x, y), where x = r cos and y

Assume that all the given functions have continuous second-order partial derivatives.

If z = f (x, y), where x = r cos θ and y = r sin θ, show that

1 3z + dr? 1 əz r år

1 3z + dr? 1 z r r

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