名校
解题方法
1 . 设
为等差数列
的前
项和,已知
,且
,
,
成等比数列.
(1)求数列
的通项公式;
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.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/82ee48233a541062b922053a35d28209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329eeaf5a8942b1e4865eb8fbbc4da7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27182444d3da4003680f07ec299087c.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdef2b8c9fa8778987bc1a2e87d10b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52c9237cb0b4acc568d4afb12997186.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
2022-05-31更新
|
908次组卷
|
3卷引用:山东省淄博市2022届高三三模数学试题
名校
解题方法
2 . 已知正项等比数列
的前
项和为
,且
成等差数列.若存在两项
使得
,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/7b05b4868a09d2e356c2507f411b2d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f7c364636a5e57d4c9e7e79d238f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93075feda46692f974aaa4c8cd8b7d27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebfaae40629f480827037653562fa87f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-05-31更新
|
1420次组卷
|
4卷引用:山东省淄博市2022届高三三模数学试题
山东省淄博市2022届高三三模数学试题重庆西南大学附属中学校2022-2023学年高三上学期期中质检数学试题(已下线)专题19 等比数列及其求和(针对训练)-2023年高考数学一轮复习精讲精练宝典(新高考专用)(已下线)第五节 基本不等式【讲】(2)
解题方法
3 . 已知数列
的前n项和分别是
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288a5c557878f2a9b4c19ce7531a5c2d.png)
(1)求
的通项公式;
(2)定义
,记
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b64f109cde567dc5750276a16a6b774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288a5c557878f2a9b4c19ce7531a5c2d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
(2)定义
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eaa125bfbd3836d59bd33e8a197501c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cc09b22a920dd641c33b50ceaabfa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
名校
解题方法
4 . 已知无穷数列
满足:当
为奇数时,
;当
为偶数时,
,则下列结论正确的为( )
![](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/0ff1c33b81ac2f065d37faef37504bb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0dd3ce757a2ad080ece0e34424fb05f.png)
A.![]() ![]() ![]() |
B.数列![]() |
C.仅有有限个整数![]() ![]() |
D.记数列![]() ![]() ![]() ![]() |
您最近一年使用:0次
2022-05-29更新
|
1708次组卷
|
4卷引用:名校联盟山东省优质校2022届高三毕业班5月模拟考试数学试题
名校联盟山东省优质校2022届高三毕业班5月模拟考试数学试题(已下线)专题26 数列的通项公式-6(已下线)考向19等差数列及其前n项和(重点)-2辽宁省铁岭市六校协作体2022-2023学年高三上学期第一次联考数学试题
解题方法
5 . 设数列
的前n项和为
,且满足
.
(1)求
;
(2)设
求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf9b29587890dab64fd9833485d3ac0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ea5136e203d77d9ab5a7777a5bd9747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
名校
解题方法
6 . 已知数列
的首项
,其前n项和为
,且对任意的
,点
均在直线
上.
(1)求
的通项公式;
(2)设
,求数列
的前n项和
.
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655c46b33730f3a29b9ec3024df71375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2afd4e75f4fbae8199a624028c947d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7deca0e894fcb5559d82816bb7a4b6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e4c2b8712f8a0990fe76704452e9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db850e54a545598c4ea061aa6aed9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2022-05-27更新
|
665次组卷
|
2卷引用:名校联盟山东省优质校2022届高三毕业班5月模拟考试数学试题
7 . 已知等差数列
的前
项和为
,且
,
;数列
满足
.
(1)求数列
和
的通项公式;
(2)记
,求数列
的前
项和.
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa69dde104dcf963e67647e801e0149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52036247d906768190750c1d8f7b6b0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e889455fe1932ea1a0542906a759712f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/308db5fd4fe9d810edc79c9998d8c5ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f41be870e84c819362787849770519.png)
您最近一年使用:0次
2022-05-26更新
|
1602次组卷
|
6卷引用:山东省济宁市2022届高三模拟考试(三模)数学试题
8 . 已知数列
满足
的前
项和为
.
(1)求数列
的通项公式;
(2)设
,数列
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffa5b9c53090e899419d4437f262005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6270b306175ccbccf8d02d8cfcca8d01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ffc8ea3fd2020c856aadb94e634773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2048d69f86c2654986737857529c82a3.png)
您最近一年使用:0次
2022-05-24更新
|
1230次组卷
|
5卷引用:湖北省十堰市东风高级中学2021-2022学年高二下学期期末综合数学试题 (2)
湖北省十堰市东风高级中学2021-2022学年高二下学期期末综合数学试题 (2)江苏省苏州市2022届高三下学期高考前模拟数学试题江苏省苏州市第六中学2022届高三下学期三模数学试题(已下线)高二数学下学期期末模拟试卷02(选择性必修第二册+数列+圆锥曲线+导数)-【题型分类归纳】2022-2023学年高二数学同步讲与练(苏教版2019选择性必修第二册)辽宁省沈阳市第二十中学2022-2023学年高二下学期第二次阶段测试(6月)数学试题
名校
解题方法
9 . 已知
是公比为2的等比数列,
为数列
的前n项和,且
.
(1)求
的通项公式;
(2)求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e2515bf4e40daa512630146662b169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59bab835d602b1e63ce005be6f53051b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91adba8efbf964e9e35547b0fd0ea36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2022-05-19更新
|
964次组卷
|
3卷引用:2022届山东省泰安市高考全真模拟数学试题
解题方法
10 . 从条件:①
为公差不为0的等差数列且
成等比数列;②
是以
为公比的等比数列;③
中任选一个,补充在下面问题中并作答.
设数列
的前n项和为
,
,对任意的
,都有___________.
(1)求数列
的通项公式;
(2)设
,是否存在
,使得对任意的
,都有
?(如果选择多个条件分别解答,按第一个解答计分)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a18556fda4a825861f1170cdeb059ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2509e0e47341d7908f9197239b3bb73a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b89c831a1efa003b198252a636253c3.png)
设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b933d363f5b85a6b4110c9ef030c56a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b08c58baacec3cd0c0a06e267fa9ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277aa09b90f3d9d6ef779bfa692dfc0e.png)
您最近一年使用:0次