Inverses

There is already an answer/

https://web2.0calc.com/questions/help-asapp_1

Check this link and let me know if it's wrong.

Hope this helps! 

It's wrong :P

Replace x by y and f(x) by x in the function definition, then rearrange to  find y:

\(x = \frac{2y-1}{y+5}\)   so  \(x(y+5)=2y-1\)  

Collect the y's   \(y(x-2)+5x = -1\)  or \(y = \frac{-5x-1}{x-2}\)

which means \(f^{-1}(x)=\frac{-5x-1}{x-2}\)

So a /c= -5/1