8
Answer: ASet 3: Function Notation (Advanced)
Explanation
PROBLEM
If f(x) = 1x + 3 and g(x) = 1x + 4, find g(f(5)).
If f(x) = 1x + 3 and g(x) = 1x + 4, find g(f(5)).
A.✓ Correct
12
B.
13
C.
14
D.
15
Detailed Explanation
Choice A is the best answer. f(5) = 1(5) + 3 = 8. g(8) = 1(8) + 4 = 12
Why others are wrong:
B: 13 is incorrect because it does not satisfy the equation.
C: 14 is incorrect because it does not satisfy the equation.
D: 15 is incorrect because it does not satisfy the equation.