2
Answer: BSet 3: Function Notation (Intermediate)
Explanation
PROBLEM
If f(x) = 2x + 2, find x when f(x) = 8.
If f(x) = 2x + 2, find x when f(x) = 8.
A.
4
B.✓ Correct
3
C.
6
D.
5
Detailed Explanation
Choice B is the best answer. 2x + 2 = 8. 2x = 6. x = 3
Why others are wrong:
A: 4 is incorrect because it does not satisfy the equation.
C: 6 is incorrect because it does not satisfy the equation.
D: 5 is incorrect because it does not satisfy the equation.