Question

Let f(x) = x^2 – 16. Find f^–1(x).

Answer 1

A) +_ 4 sqrt x
B) +_ sqrt x + 16
C)x^2/16
D) 1/x^2-16

Answer 2

let y = x^2 - 16. switch the positions of the x's and y's to get x = y^ - 16. then solve for y.

x + 16 = y^2
sqrt(x+16) = y

Answer 3

B, then