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已知正项数列{an}中有,则( ) A.0 B.1 C.2 D.
已知正项数列{a
n}中有
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182702267263607/SYS201310241827022672636016_ST/0.png)
,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182702267263607/SYS201310241827022672636016_ST/1.png)
( )
A.0
B.1
C.2
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182702267263607/SYS201310241827022672636016_ST/2.png)
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