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在等差数列{an}中,若a1+a5+a9=,则tan(a4+a6)= .
在等差数列{a
n}中,若a
1+a
5+a
9=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124340997985503/SYS201310251243409979855010_ST/0.png)
,则tan(a
4+a
6)=
.
考点分析:
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