A) decreasing in R
B) increasing in R
C) increasing in \[(0,\,\,\infty )\] and decreasing in \[(-\infty ,\,\,0)\]
D) decreasing in \[(0,\,\,\infty )\] and increasing in \[(-\infty ,\,\,0)\]
Correct Answer: B
Solution :
\[f(x)={{x}^{3}}-3{{x}^{2}}+5x+7\] \[f'(x)=3{{x}^{2}}-6x+5>0\] \[f'(x)\,=3{{x}^{2}}-6x+5<0\] \[x\in \phi \]
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