Category:Examples of Use of Primitive of Function under its Derivative

This category contains examples of use of Primitive of Function under its Derivative.

Let $f$ be a real function which is integrable.

Then:

$\ds \int \frac {\map {f'} x} {\map f x} \rd x = \ln \size {\map f x} + C$

where $C$ is an arbitrary constant.