A partial derivative is the rate of change of a multi ...

A partial derivative of a function f with respect to a variable x, say z=f(x,y1,y2,...yn) (where the yi's are other independent variables) is commonly denoted in the following ways: (referred to as ``partial of z with respect to x'') (referred to as ``partial of f with respect to x'' ) Note that this is not the usual derivative ``d'' . ................
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