名校
1 . 已知数列
的前
项和
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7020cf98fa9b1c2458105199fb22197c.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a402e7657ed4358748564d86d4019c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7020cf98fa9b1c2458105199fb22197c.png)
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2017-02-19更新
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1059次组卷
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5卷引用:内蒙古北方重工业集团有限公司第三中学2018-2019学年高三第二次模拟数学(理)试题