Let f be a function of two variables and suppose that all the first order partial derivatives of f exist and are continuous at all points. Show that for the composite function w=xyf(xz,yz) the following equation holds:
x(dw/dx)+y(dw/dy)-z(dw/dz) = 2w

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Cal 3 university. This is a partial derivatives question

kk, give me min to type it out.

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