8
Answer: ASet 1: Function Notation (Advanced)
Explanation
PROBLEM
If f(x) = 1x + 5 and g(x) = 3x + 1, find g(f(4)).
If f(x) = 1x + 5 and g(x) = 3x + 1, find g(f(4)).
A.✓ Correct
28
B.
26
C.
25
D.
31
Detailed Explanation
Choice A is the best answer. f(4) = 1(4) + 5 = 9. g(9) = 3(9) + 1 = 28
Why others are wrong:
B: 26 is incorrect because it does not satisfy the equation.
C: 25 is incorrect because it does not satisfy the equation.
D: 31 is incorrect because it does not satisfy the equation.