Question

How do you find the inverse of `f(x)=x+4`?

Answer 1

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

Explanation:

Write as

`y=x+4`

Switch `x` and `y`.

`x=y+4`

Solve for `y`.

`y=x-4`

This can be also written as

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