What is the inverse of f(x) = x-8?

Apr 17, 2018

${f}^{-} 1 \left(x\right) = x + 8$

Explanation:

$\text{we have } y = x - 8$

$\text{make x the subject}$

$\text{add 8 to both sides}$

$\Rightarrow x = y + 8$

$\Rightarrow {f}^{-} 1 \left(x\right) = x + 8$