Question

Which function is the inverse of f(x)=2x+3​

Answer 1

`f^(-1)` (x) =
`(x-3)/(2)`

Explanation:

let y = f(x) and rearrange making x the subject

y = 2x + 3 ( subtract 3 from both sides )

y - 3 = 2x ( divide both sides by 2 )

`(y-3)/(2)` = x

Change y back into terms of x, that is

`f^(-1)` (x) =
`(x-3)/(2)`