Question

f f(x)=3x-8 the f^-1 (y) =??

Answer 1

suppose you had
\[3x-8= 50\] and you had to solve for x. what would you do?
1) add 8
2) divide by 3

that is what the inverse does. it is
\[f^{-1}(y)=\frac{y+8}{3}\]

Answer 2

Thanks!