Find $\frac{\partial w}{\partial r}$ using the appropriate Chain Rule for $w = x^2 - 16xy + y^2$ where $x = r + \theta$ and $y = r - \theta$.
Added by Katherine L.
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To do this, we need to apply the Chain Rule. The Chain Rule states that if we have a function of the form f(g(x)), then the derivative of f(g(x)) with respect to x is given by f'(g(x)) * g'(x). In this case, our function f is the square root function and our Show more…
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