Question

If f(x) = 4^x - 8 and g(x) = 5x + 6, find (f - g)(x).

A. (f-g)(x) = 4^x +5x -2
B. (f-g)(x) = -4^x +5x +14
C. (f-g)(x) = 4^x -5x -14
D. (f-g)(x) = -x -14

Answer 1

C. 4^x - 5x - 14.

Explanation:

(f - g) x

= 4^x - 8 - (5x + 6)

= 4^x - 5x - 8 - 6

= 4^x - 5x - 14.