# More Derivatives of Logarithms

Whenever possible, rewrite a function so it looks good *before* taking its derivative.

Any logarithm log* _{b }a* can be written as

This allows us to find derivatives of logarithms in bases besides *e*.

We also know enough now to find derivatives of things like

*f*(*x*) = ln (*x*^{2}).

We can bring down the exponent to find

*f*(*x*) = 2 ln* x*,

and we know how to find the derivative of this:

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