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