# How do you find the inverse of #f(x) = 3log(x-1)#?

##### 1 Answer

Jul 19, 2015

I found:

#### Explanation:

I am not sure it is the "formal" way to do it but I do it like this:

I try to "extract"

assuming base

now I switch

Graphically:

graph{3log(x-1) [-10, 10, -5, 5]}

and:

graph{1+10^(x/3) [-10, 10, -5, 5]}