1 . 若数列
满足
,且对于任意的
,都有
,则数列
的前
项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57914b2d4a7a75b3bfbcd2af9205771d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
您最近一年使用:0次
2021-05-11更新
|
1513次组卷
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3卷引用:安徽省淮南市寿县第一中学2020-2021学年高二下学期6月月考文科数学试题
名校
解题方法
2 . 数列
的前
项和为
满足
,且
,
,
成等差数列.
(1)求数列
的通项公式;
(2)设
,求数列
的前
和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/933a50dbb9e254ca2f723781737aa3a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3cc46a1f04bd055fae4cdf1c32dca05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cac0de42a5f24538a18373c22c3262e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a19230cdd2f5c6ad8e56dffe817502f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b50141a9dcda3604d9b1030d0454b8cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2020-09-26更新
|
493次组卷
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5卷引用:安徽省淮南市第一中学2020-2021学年高二上学期开学考试数学试题
安徽省淮南市第一中学2020-2021学年高二上学期开学考试数学试题河南省平顶山市、许昌市、汝州2017-2018学年高二上学期第二次联考数学试题河南省豫北名校2020-2021学年高二上学期11月质量检测数学(理)试题(已下线)拓展二 数列求和的方法(精练)-2020-2021学年一隅三反系列之高二数学新教材选择性必修第二册(人教A版)辽宁省葫芦岛第六高级中学2017-2018学年高三上学期第二次阶段(期中)考试题数学(理)