# Thread: Exponential and logarithmic functions

1. ## Exponential and logarithmic functions

The poi nt P(-1,1/3) lies on the graph of the exponential function f(x) = bx, then b =

I need the steps please or What I should know before I see an exercise like this in a exam!!

2. ## Re: Exponential and logarithmic functions

You are told that $y= b^x$, and that when x= -1, y= 1/3. That is, $b^{-1}= 1/3$. Now, do you know what "-1 power" means?

a​-n = 1/an