10
Answer: DSet 1: Function Notation (Advanced)
Explanation
PROBLEM
If f(x) = 2x - 2, find x when f(x) = 4.
If f(x) = 2x - 2, find x when f(x) = 4.
A.
5
B.
4
C.
6
D.✓ Correct
3
Detailed Explanation
Choice D is the best answer. 2x - 2 = 4. 2x = 6. x = 3
Why others are wrong:
A: 5 is incorrect because it does not satisfy the equation.
B: 4 is incorrect because it does not satisfy the equation.
C: 6 is incorrect because it does not satisfy the equation.
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