名校
解题方法
1 . 已知正项数列{an}满足a1=2且an+12﹣2an2﹣anan+1=0,令bn=(n+2)an,则数列{bn}的前8项的和等于 __ .
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2022-03-21更新
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779次组卷
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6卷引用:解密11 数列的前n项和及其应用(分层训练)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(全国通用)
(已下线)解密11 数列的前n项和及其应用(分层训练)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(全国通用)(已下线)专题4.5 错位相减法求和-2021-2022学年高二数学特色专题卷(人教A版2019选择性必修第二册)(已下线)专题4求和运算 (基础版)云南省大理市2022届高三上学期复习统一检测数学(理)试题(已下线)专题04 数列(2)江苏省淮安市盱眙中学2023届高三下学期模拟训练八数学试题
21-22高二·全国·课后作业
解题方法
2 . 已知数列{an}的前n项和为Sn且满足
.
(1)求证:数列{an}是等比数列,并求{an}的通项公式;
(2)设bn=n•an,求数列{bn}的前n项和Tn.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7825445c2b90c7df8fab8f420a3699c.png)
(1)求证:数列{an}是等比数列,并求{an}的通项公式;
(2)设bn=n•an,求数列{bn}的前n项和Tn.
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3 . 已知数列
满足
,
,则数列
的通项![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40436f0a1c37a447693808aeb3678a41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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21-22高二·全国·假期作业
解题方法
4 . 已知
满足
,
,求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3998df04d0a8ded946c3f39d545fdc7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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解题方法
5 . 已知数列
满足
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fcced4cf0c060263af650c0ca39ee5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
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2022-07-15更新
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1663次组卷
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8卷引用:1.3.1 等比数列及其通项公式(同步练习提高版)
1.3.1 等比数列及其通项公式(同步练习提高版)四川省成都市金牛区2020-2021学年高一下学期期末数学试题河南省周口恒大中学2022-2023学年高二下学期2月月考数学试题(已下线)第4讲 等比数列的通项及性质5大题型总结(1)重庆市杨家坪中学2022-2023学年高二上学期期末数学试题4.3.1 等比数列的概念练习(已下线)4.3.1 等比数列的概念——课后作业(基础版)新疆维吾尔自治区昌吉市第一中学2023-2024学年高二上学期12月月考数学试题
6 . 已知数列{
n}的前n项和是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82fa34b92c437492a1050134089eb7f3.png)
(1)求证:数列
是等比数列;
(2)数列
的前n项和是
,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82fa34b92c437492a1050134089eb7f3.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f331591a8a32f3e781af90af3a53154.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2228a53178b3ce08e34591a209fba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02e80983b88cdf6b540502816c87d13.png)
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解题方法
7 . 已知数列
满足
,
,若
是
,
的等比中项,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15de767f5c2897a6c659651c8277213a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da4cd81500bdb43118150dbdb1541e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ae1522a36768618f7ddaf74abbb7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07f7a46323e7630dd8cd5cffcb11a5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1505d56f0b35fe7f2de1fe1888036e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e486a69c94a6442bb2131452fd88996f.png)
A.12 | B.![]() | C.![]() | D.4 |
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8 . 设数列
满足:
,且对任意的
,都有
,
为数列
的前n项和,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606e55241a2e145d54849129b8ffd20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3082aa4390cb5575e6030d521e3e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209591cfb9f8271f5ad48d89f214f22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3998df04d0a8ded946c3f39d545fdc7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606e55241a2e145d54849129b8ffd20f.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2022-02-02更新
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870次组卷
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3卷引用:江苏省扬州市四校2021-2022学年高二上学期期末联考数学试题
解题方法
9 . 数列
满足
,
.
(1)求证:数列
是等比数列;
(2)求数列
的通项公式.
![](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/17de11bec49c0896a6a7bc757ab308b7.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40dc43b8d11d5462e4b525dd7b03bcfc.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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名校
解题方法
10 . 在数列
中,
,且
.
(1)证明;数列
是等比数列.
(2)若
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa05c32e2bea459340d313415e7fa48.png)
(1)证明;数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab03f46e557ea88e91de9984b259a5c9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46246efcc2fed9027043f5fc66f45a42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da72309d2507e2f5e5ed88d8cc08963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2022-01-26更新
|
763次组卷
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4卷引用:4.3等比数列A卷