Question

If Fx) = 7x, which of the following is the inverse of (Fx)?

A. F^1(x) = x/7
B. F^1(x) = 7x
C. F^1(x) = x-7
D. F^1(x) = x+7

Answer 1

Answer:

A. F^1(x) = x/7

Step-by-step explanation:

$y = 7x \\ x = 7y \\ \frac{x}{7} = \frac{7y}{7}$

$y = \frac{x}{7}$

Therefore the inverse is

$f {}^{1} = \frac{x}{7}$