24、证明：(x+1)ln(1+x)＞arctanx,其中x＞0
人气：402 ℃ 时间：2019-11-18 11:52:01
解答
作函数f=左边-右边,求导证明单调递增.并且f(0)=0.因为x>0,所以f>0恒成立.不等式得证.
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