Question

If f(x)=9x, which of the following is the inverse of f(x)

A) f^-1(x)=9/x

B) f^-1(x)=x-9

C) f^-1(x)=x+9

D) f^-1(x)=x/9


PLEASE HURRY!!!

Answer 1

I think it's D cus the inverse of 2 is also 1 over 2

Answer 2

`f^(-1)x=(x)/(9)`

Explanation:

Given :
`f(x)=9x`

To Find: Inverse of f(x)

Solution:

`y=9x`

Replace x with y and y with x.

`x=9y`

`(x)/(9)=y`

`(x)/(9)=f^(-1)x`

Thus the inverse is
`f^(-1)x=(x)/(9)`

Hence the inverse of
`f(x)=9x` is
`f^(-1)x=(x)/(9)`