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I am dealing with an equality of the form:

[tex]f(x)=g(y,z)[/tex]

and I need to compute ##dx##.

Is the following relation correct?

[tex]dx={(\frac{\partial f}{\partial x})}^{-1}( \frac{\partial g}{\partial y}dy + \frac{\partial g}{\partial z}dz )[/tex]

Thank you in advance.

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# I Differentiate two variables functions

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