Properties of a different kind of a logarithm

107 Views Asked by At

We all have heard about the natural logarithm for any number. Basically we all know that the natural logarithm is the logarithm to the base of $e$,which is a transcendental number. Now what about the other transcendental numbers such as $\pi$ . How would the logarithm to the base of $\pi$ behave. By behave I mean how will the graph of this kind of a logarithm look like,what will be its properties?

Thank you

1

There are 1 best solutions below

4
On

I think you'll find that all logarithmic curves 'look' and behave the same. They only differ by a scalar factor. For example:

$$\text{If } y = \pi^x\text{, then we want}\log_\pi(\cdot)\text{ such that }x = \log_\pi{y}$$ $$\text{But }y = \pi^x = e^{\ln(\pi)x}\text{, so } x = \frac{\ln(y)}{\ln(\pi)}$$ Putting this together: $$\log_\pi(x) = \frac{\ln(y)}{\ln(\pi)}$$ Where $\ln(x)$ is the 'natural' logarithm. This property hold for all Real $c>0$ as an exponential base.