Question

If f(x) = 8x, which of the following is the inverse of f(x)?

A. f –1(x) = x + 8
B. f –1(x) = x – 8
C. f –1(x) =
D. f –1(x) =

Answer 1

f^-1(x)=x/8

Explanation:

Answer 2

y=8x

To find the inverse, flip the x and y variables and then solve for y.

x=8y
x/8=8y/8
x/8=y

Final answer: f^-1(x)=x/8