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ln(x+1)^2 怎么求导?
人气:448 ℃ 时间:2019-09-17 11:46:21
解答
ln(x+1)^2
令u=x+1,t=u^2,y=lnt
[ln(x+1)^2]'
=(lnt)'*(t)'*(u)'
=[1/(x+2)^2]*2(x+1)*1
=2(x+1)/(x+2)^2
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