Question: Assume that all the given functions are differentiable. If u = f (x, y), where x = e s cos t and y = e

Assume that all the given functions are differentiable.
If u = f (x, y), where x = e^s cos t and y = e^s sin t, show that Не ди ди 2 ди -2я ди дs дt дх ду

2 -2 s t

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