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The function f(x) = x^3 is what over all real numbers?
ADecreasing everywhere
BIncreasing everywhere
CDecreasing for x < 0 only
DIncreasing for x > 0 only
Answer & Solution
Correct answer: B. Increasing everywhere
f'(x) = 3x^2 is never negative and is zero only at x = 0, so f always rises.
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