Question

Please help urgent!!!!

Answer 1

Answer:

B

Step-by-step explanation:

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

y = (2x - 4)² ( take the square root of both sides )

$\sqrt{y}$ = 2x - 4 ( add 4 to both sides )

$\sqrt{y}$ + 4 = 2x ( divide terms on both sides by 2 )

$\frac{1}{2}$$\sqrt{y}$ + 2 = x

x = $\frac{1}{2}$$\sqrt{y}$ + 2

Change y back into terms of x

$f^{-1}$(x) = $\frac{1}{2}$$\sqrt{x}$ + 2, x ≥ 0