Question

If FX) = 3x+6, which of the following is the inverse of Fx)?

A. F1(x) = 6 - 3x
B. F1(x) = 3x - 6
C. F'(x) = x - 6 / 3
D. F'(x) = x - 3 / 6

Answer 1

C. F'(x) = x - 6 / 3

Explanation:

`y = 3x + 6`

`x = 3y + 6 \\ x - 6 = 3y + 6 - 6`

`(x - 6)/(3) = (3y)/(3)`

`y = (x - 6)/(3)`

`f1 = (x - 6)/(3)`