已知数列
满足
.
(1)求数列
的通项公式;
(2)已知数列
的前n项和为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00688730302c3285243035f54ce146ab.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4f40060592fbba6263e645418abf98a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
21-22高三上·新疆昌吉·阶段练习 查看更多[4]
新疆昌吉教育体系2022届高三上学期第四次诊断测试数学(文)试题(已下线)第01讲 数列-【寒假自学课】2022年高二数学寒假精品课(人教A版2019选择性必修第二册)(已下线)解密09 数列前n项和及其应用(讲义)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(新高考专用) (已下线)专题3.1 模拟卷(1)-2022年高考数学大数据精选模拟卷(新高考地区专用)
更新时间:2022-01-02 17:41:42
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【推荐1】已知数列
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(2)设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146bf502d7a3eb5731664003dcbd3bee.png)
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【推荐2】若数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248ce3a2c9dd3114946ddcbef7bbaa7a.png)
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【推荐1】已知数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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【推荐2】已知在非零数列
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【推荐1】已知数列{an}的前n项和为Sn,a1=2,且满足an+1=Sn+2n+1(n∈N*).
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4689920e36d2ac304503d852083b07a4.png)
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【推荐2】已知正项数列
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且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b60dfed9dee397c2f15ec67c1be4b1c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/832d1e3a06f59a35396aac6e12c5e2ee.png)
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