Question

Let f(x)= sqrt x-5.Find f -1.
A.
f -1 (x) = x 2 + 25; y ≥ 25

B.
f -1 (x) = x 2 + 5; y ≥ 5

C.
f -1 (x) = (x + 5) 2; y ≥ 5

D.
f -1 (x) = x 2 + 25; y > 5