# F(x) = 1/(x+1) - 2/9

1. Jun 14, 2009

### Mathysics

f(x) = 1/(x+1) - 2/9

just wondering whats f-1 (y) will be

ill have a go at it now thx

Last edited: Jun 14, 2009
2. Jun 14, 2009

### arildno

Re: functions

Well, what have you tried so far?

3. Jun 14, 2009

### symbolipoint

Re: functions

You have some text-form expression difficulties. You seem to want to find the inverse of
f(x) = $$\frac{1}{x+1}$$ - $$\frac{2}{9}$$
In which you may create the transformation using f(x)=y of
x = $$\frac{1}{y+1}$$ - $$\frac{2}{9}$$

Solve for y which will really be your inverse of the original function. Watch your algebra steps carefully, and then try checking your result again.

That looks very bad when I view the forum result; the 'tex' tagged portions look blackened and are not readable or legible. Is this just me here, or does it look that way for everybody?

Last edited: Jun 14, 2009
4. Jun 14, 2009

### Mathysics

Re: functions

wow thank you very much i got it now :)

Last edited: Jun 14, 2009