Answer: In 3948, use the Chain Rule to find the indicated partial derivatives
Chapter 9, Problem 47(choose chapter or problem)
In Problems 39-48, use the Chain Rule to find the indicated partial derivatives.
\(\begin{array}{l}w=\sqrt{x^{2}+y^{2}} ; x=\ln (r s+t u) \\y=\frac{t}{u} \cosh r s ; \frac{\partial w}{\partial t}, \frac{\partial w}{\partial r}, \frac{\partial w}{\partial u}\end{array}\)
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