When I have a function z = f(x, y), i. e., a function of various variables, the differential form of z is: [tex]dz = \frac{\partial f}{\partial x} dx + \frac{\partial f}{\partial y} dy[/tex] or the derivative of z is: [tex]\frac{dz}{dt} = \frac{\partial f}{\partial x} \frac{dx}{dt} + \frac{\partial f}{\partial y} \frac{dy}{dt}[/tex] So, analogously, if I take the integral of z wrt t, so how come to be the expression for f?(adsbygoogle = window.adsbygoogle || []).push({});

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# Integral of a function of various variables

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