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已知关于x的方程tan2x-tanx-a+1=0在内恰有两个不相等的实数根,则a...
已知关于x的方程tan
2x-tanx-a+1=0在
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222616315628941/SYS201311012226163156289015_ST/0.png)
内恰有两个不相等的实数根,则a的取值范围是
.
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