plz...
can anyone help me by giving code for calculating max error of u=(5xy^2)/z^3

This might be one place to start

You should start by finding the total differential of your formula. Then, computing it is a trivial matter with minimal knowledge of C++.

max error in u is given by du = dx + 2dy + 3dz where dx,dy and dz are the individual errors in x,y and z

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