# Thread: How do a find the answer for the log of something that isnt base 10?

1. ## How do a find the answer for the log of something that isnt base 10?

This is the question:
Im just curious as to whether its even possible to solve this, because they want me to find the derivative, and the inverse of it
Thankyou!

2. Originally Posted by appleseed
This is the question:
Im just curious as to whether its even possible to solve this, because they want me to find the derivative, and the inverse of it
Thankyou!
Note that $2^x = e^{ln 2^x} = e^{(ln 2) x}$.

To get the inverse, the usual approach is to swap around y and x and then make y the subject.