## anonymous one year ago given that the function f(x)=x^2-6x has domain [3,infinite), which of the following functions is the inverse of f(x)?

1. anonymous

solve $x=y^2-6y$ in a few steps

2. anonymous

that is, solve for $$y$$

3. anonymous

you know how to do that?

4. anonymous

5. anonymous

i think i do.. would it be y=3+sqrt9+x

6. anonymous

maybe let me check

7. anonymous

$3+\sqrt{x+9}$ yes

8. anonymous

plus the radical because of the domain, otherwise it would be $$\pm$$ which is not a function

9. anonymous

okay so then whatttt

10. anonymous

then go have a beer you are done

11. anonymous

$f^{-1}(x)=\sqrt{x+9}+3$

12. anonymous

or however you need to write it

13. anonymous

hahahaha ill take you up on that in 3 years. ill post another question soon

14. anonymous

k

15. anonymous

that is a long time before my next beer though