\begin{array}{l}{\text { If } u=f(y-z, z-x, x-y), \text { prove that } – InterviewSolution

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1.	\begin{array}{l}{\text { If } u=f(y-z, z-x, x-y), \text { prove that }} \\ {\frac{\partial u}{\partial x}+\frac{\partial u}{\partial y}+\frac{\partial u}{\partial z}=0}\end{array}
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