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设数列{}是等差数列,且a2a4+a4a6+a6a2=1,a2a4a6=,则a1...
设数列{
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}是等差数列,且a
2a
4+a
4a
6+a
6a
2=1,a
2a
4a
6=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124139789017774/SYS201310251241397890177008_ST/1.png)
,则a
10=( )
A.1
B.-1
C.
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D.-1或
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考点分析:
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