Question

Please help with the question.

Answer 1

Answer:

B

Step-by-step explanation:

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

y = x² + 7 ( subtract 7 from both sides )

y - 7 = x² ( take the square root of both sides )

± $\sqrt{y-7}$ = x

Change y back into terms of x, thus

$f^{-1}$(x) = ± $\sqrt{x-7}$