Question: Assume that all the given functions are differentiable. If z =-[f(ax + y) + g(ax y)], show that a? a az az ? ? ,

Assume that all the given functions are differentiable.
If z =-[f(ax + y) + g(ax – y)], show that a? a a²z az у? ду дх? ду,

If z =-[f(ax + y) + g(ax y)], show that a? a az az ? ? ,

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