SAT Math Multiple Choice Practice Question 91: Answer and Explanation

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Question: 91

3. Given that f(x) = x3, for which number is f(x) < x?

A. -2
B. -1
C. 0
D. 1
E. 2

Correct Answer: A


A. The best way to solve this problem is to substitute each answer choice into the given equation. Lucky for you, (-2)3 = -8, which is less than -2, so you can stop checking the possibilities right there.

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