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设函数f(x)=x-lnx(x>0),则y=f(x)( ) A.在区间(,1),...
设函数f(x)=
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x-lnx(x>0),则y=f(x)( )
A.在区间(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190840168111150/SYS201310241908401681111009_ST/1.png)
,1),(l,e)内均有零点
B.在区间(
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,1),(l,e)内均无零点
C.在区间(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190840168111150/SYS201310241908401681111009_ST/3.png)
,1)内无零点,在区间(l,e)内有零点
D.在区间(
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,1)内有零点,在区间(l,e)内无零点
考点分析:
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