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In|x|的导数是多少?为什么In|x|=1\x?
题目详情
In|x|的导数是多少?
为什么In|x|=1\x?
为什么In|x|=1\x?
▼优质解答
答案和解析
x>0,y=ln|x|=lnx,y'=1/x
x<0,y=ln|x|=ln(-x),y'=1/x(注意此处导数小于0)
x<0,y=ln|x|=ln(-x),y'=1/x(注意此处导数小于0)
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