Let f (x) = sqrt x-5 Find f - 1.

A. f ^-1 (x) = x2 + 25; y > 5

B. f ^-1 (x) = (x + 5) 2; y ≥ 5

C. f ^-1 (x) = x2 + 25; y ≥ 25

D. f ^-1 (x) = x2 + 5; y ≥ 5

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