## anonymous 2 years ago I'm trying to find the inverse of an equation and I'm not sure what to do next. http://oi43.tinypic.com/xldkhu.jpg

1. hartnn

how u got x= 3ln y ?

2. hartnn

f(x) = 3+ ln x y= 3+ ln x interchange 'x' and 'y' x = 3+ ln y can u try to isolate 'y' from here ?

3. anonymous

(I'm just a tard who makes mistakes too often on her math homework...) Right now I have x-3=lny.

4. anonymous

Not sure what to do now

5. hartnn

you are correct till that step! now use this : $$\large a= \ln b \implies e^a = b$$ from the definition , so what about (x-3) = ln y ?

6. anonymous

$y=e ^{x-3}$

7. anonymous

8. hartnn

absolutely! thats your inverse function :)

9. anonymous

Thanks for the help! :)

10. hartnn

welcome ^_^