1 . 设数列
的前
项和
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
A.3 | B.4 | C.5 | D.6 |
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2015-08-24更新
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328次组卷
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2卷引用:2014-2015学年福建省三明市高一下学期期末质量检测数学试卷
A.3 | B.4 | C.5 | D.6 |