Interval
Sign of
f
\(^\prime\)
Conclusion
\((-\infty ,0)\)
positive
\(f\) is increasing on \((-\infty ,0)\)
(0,1)
positive
\(f\) is increasing on \((0,1)\)
\((1,\infty)\)
negative
\(f\) is decreasing on \((1,\infty )\)