Question

f^-1(x) = 3 root x-7

How do I figure this out?

Answer 1

What you wanna figure out?

Answer 2

the problem reads find f^-1(x) f(x)=3sqrroot x-7

Answer 3

not sure what to do

Answer 4

First let y=f(x),

Think of inverse, you have to find "x" in terms of "y",

\[f(x)=3\sqrt{x-7} \\ \\ y=3\sqrt{x-7} \\ \\ \frac{y}{3}=\sqrt{x-7} \\ \\ x-7=\frac{y^2}{9} \\ \\ x=\frac{y^2}{9}+7 \\ \\ f^{-1}(x)=\frac{x^2}{9}+7\]

Answer 5

ok