2

Set 2: Function Notation (Advanced)

Explanation

Answer: B

PROBLEM

If f(x) = 1x + 5 and g(x) = 2x + 2, find f(g(4)).

If f(x) = 1x + 5 and g(x) = 2x + 2, find f(g(4)).

A.

18

B.

15

✓ Correct
C.

14

D.

17

Detailed Explanation

Choice B is the best answer. g(4) = 2(4) + 2 = 10. f(10) = 1(10) + 5 = 15

Why others are wrong:
A: 18 is incorrect because it does not satisfy the equation.
C: 14 is incorrect because it does not satisfy the equation.
D: 17 is incorrect because it does not satisfy the equation.