名校
解题方法
1 . 已知数列
的前
项和为
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e793c7fed145683cd021d1110be5ee.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/e6f18f2c2ec67b5e59e4b3d28795d125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d6f36ef5c8d4a8289da44d6c03bc9c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e793c7fed145683cd021d1110be5ee.png)
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2021-11-13更新
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867次组卷
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2卷引用:广西崇左市高级中学2021-2022学年高二上学期阶段检测(一)数学试题
2 . 数列
中,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982fe4bb276820ffa80af8223692599a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac326f9f4ad78d0053c113f823ea6d60.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次