Question

What is the inverse of the function ? * f(x)=x+4

Answer 1

Answer:

$f^-1(x)=x-4$

Explanation:

$f(x)=x+4\\y=x+4$

We first replace f(x) with y.

We then switch x and y.

$x=y+4$

We then find y in terms of x in our new equation.

$y=x-4$

We then replace y with  $f^-1(x)$.

$f^-1(x)=x-4$