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

Answer:

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

Step-by-step explanation:

$y = 3x + 6$

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

$\frac{x - 6}{3} = \frac{3y}{3}$

$y = \frac{x - 6}{3}$

$f1 = \frac{x - 6}{3}$