## anonymous one year ago Find the inverse of the function. f(x) = 7x + 2

1. Nnesha

f(x) is same as y so you can write that equation as $\huge\rm \color{blue}{y}=7\color{ReD}{x}+2$ now to find inverse switch y and x $\huge\rm \color{blue}{x}=7\color{ReD}{y}+2$ solve for y^

2. Nnesha

can you solve x =7y +2 for y ?

3. anonymous

is it a one to one function?

4. Nnesha

did you solve that equation for y what did you get ?

5. anonymous

no

6. Astrophysics

To find the inverse: Replace f(x) with y Switch x's and y's, so put x where y is and x where y is. Solve for y Replace y with f^-1(x)

7. Nnesha

 so put x where y is and x where y is so put x where y is and y where x is

8. Nnesha

x=7y+2 do you know how to solve that equation for y ?

9. Astrophysics

Lol nice

10. anonymous

ooooooh so it would be f-1(x) =x-2/7

11. Nnesha

can you please tell me how u got that ? @zoeg :=)

12. Nnesha

oh well nvm i've to go if you mean (x-2)/7 then yes that's right.