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Dear student,
we know, if for an interval, f'(x)>0, then f(x) is increasing for that interval and if for an interval, f'(x)<0, then f(x) is decreasing for that interval.
Regards!
we know, if for an interval, f'(x)>0, then f(x) is increasing for that interval and if for an interval, f'(x)<0, then f(x) is decreasing for that interval.
Regards!