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The function f(x) = x3 + 3x is increasing in interval ______.
Mathematics
Applications of Derivatives
Question
Updated
19 Aug 2026
The function f(x) = x3 + 3x is increasing in interval ______.
A
Choose Your Answer
A
(– \(\infty\), 0)
B
(0, \(\infty\))
C
R
D
(0, 1)
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