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A function $f$ is strictly increasing on an interval if, throughout it:
A$f'(x) = 0$
B$f'(x) < 0$
C$f'(x) > 0$
D$f(x) > 0$
Answer & Solution
Correct answer: C. $f'(x) > 0$
A function is strictly increasing where its derivative is positive.
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