Question

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

Answer 1

Answer:

$f^{-1}$ (x) = $\frac{x-3}{2}$

Step-by-step 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 )

$\frac{y-3}{2}$ = x

Change y back into terms of x, that is

$f^{-1}$ (x) = $\frac{x-3}{2}$