Question

How do you find the inverse of `f(x) = 5x + 2`?

Answer 1

`f^-1(x) = (x - 2)/5`

Explanation:

`f(x) = 5x + 2 => f(x) = y:`

`y = 5x + 2=>` switch `x & y:`

`x = 5y + 2=>` solve for `y:`

`5y = x - 2`

`y=(x-2)/5=>`inverse function:

`f^-1(x) = (x - 2)/5`