differentiation

Question: The function $f(x)={{x}^{3}}-3{{x}^{2}}-24x+5$ is an increasing function in the interval given below



1) $(-\infty ,\,-2)\cup (4,\infty )$
2) $(-2,\infty )$
3) (–2, 4)
4) $(-\infty ,\,4)$
Solution: Explanation: No Explanation
Increasing and Decreasing function

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