名校
解题方法
1 . 若
是等差数列
的前
项和,
,则( )
![](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/d426ccd0c92abf9c68df97792a5fe210.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2023-07-21更新
|
1364次组卷
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8卷引用:北京市怀柔区2022-2023学年高二下学期期末考试数学试题
北京市怀柔区2022-2023学年高二下学期期末考试数学试题北京市中国人民大学附属中学2023-2024学年高二下学期期中考试数学试题【北京专用】专题01数列(第一部分)-高二上学期名校期末好题汇编(已下线)专题01 等差数列4种常考题型归类【好题汇编】-备战2023-2024学年高二数学下学期期末真题分类汇编(北京专用)(已下线)第五章 数列 综合测试A(基础卷)(已下线)第4.2.2讲 等差数列的前n项和公式(第1课时)-2023-2024学年新高二数学同步精讲精练宝典(人教A版2019选修第二、三册)(已下线)4.2.2 等差数列的前n项和公式(分层练习)-2023-2024学年高二数学同步精品课堂(人教A版2019选择性必修第二册)(已下线)专题01 数列(6大考点经典基础练+优选提升练)-【好题汇编】备战2023-2024学年高二数学下学期期末真题分类汇编(新高考专用)
名校
解题方法
2 . 已知在数列{
}前n项和
,则数列{
}的通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f07ee1fd9cc31c46e4aa7500d074d958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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2023-05-11更新
|
466次组卷
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4卷引用:北京市第三十五中学2022-2023学年高二下学期期中测试数学试题
名校
解题方法
3 . 从①前
项和
,②
,③
且
,这三个条件中任选一个,补充到下面的问题中,并完成解答.
在数列
中,
,_______,其中
.
(Ⅰ)求
的通项公式;
(Ⅱ)若
成等比数列,其中
,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2527661ffef44f2f3608931320824464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82083d099419c4e254567e95a94b4455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b50b3927041221a53f19b6a0549d71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b93bb2c66e49ac3efaf0686d4f3815.png)
在数列
![](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/48f093c61867ee4ce75f951d46b9b123.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b20d57209d2856e0f4ccf449b060723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51a54da56300aa0ca6d860e7dab876e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb993b720fccaed91435fc8b2272e85b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2020-05-12更新
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1155次组卷
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8卷引用:2020届北京市西城区高三诊断性考试(二模)数学试题
4 . 已知数列
的前
项和为
,已知
,则
( )
![](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/f42e835445f7e063cf1031c78d8cffe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4330efbe82ab6a7261ef78860c08be70.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-03-02更新
|
409次组卷
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2卷引用:北京市西城区外国语学校2019-2020学年高三数学上学期期中数学试题
5 . 已知数列
的前
项和
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/379b88c3c830c8814e817a11a9879041.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/4695f7d09c11f1ededdd30ae3ae01b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/379b88c3c830c8814e817a11a9879041.png)
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2019-10-25更新
|
1065次组卷
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6卷引用:北京师范大学第二附属中学2021-2022学年高二下学期6月月考数学试题
6 . 设数列
的前
项和为
,若
且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d524156ad8c5878adbd55241995c415.png)
求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
若数列
满足
,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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d524156ad8c5878adbd55241995c415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e191086446263b7bbbd93613577c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2019-08-06更新
|
967次组卷
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3卷引用:北京交大附中东校区2019-2020学年高二(上)期中数学试题
7 . 若对任意的正整数
,总存在正整数
,使得数列
的前
项和
,则称
是“回归数列”.
(1)①前
项和为
的数列
是否是“回归数列”?并请说明理由;
②通项公式为
的数列
是否是“回归数列”?并请说明理由;
(2)设
是等差数列,首项
,公差
,若
是“回归数列”,求
的值;
(3)是否对任意的等差数列
,总存在两个“回归数列”
和
,使得
成立,请给出你的结论,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.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/3693c7c942afef5517a3c18997c878df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)①前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d255ea8e125b603d6b640bdf4a804922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
②通项公式为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42fef6975d285cabcf6be67c78f30d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](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/d2d8bbb4a09e0ac86bbae46222a90841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(3)是否对任意的等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d053924a53b4839e4cefc598e1e6b0.png)
您最近一年使用:0次
2019-06-17更新
|
855次组卷
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10卷引用:北京市东城汇文中学2017-2018学年高三上期中(理)数学试卷
北京市东城汇文中学2017-2018学年高三上期中(理)数学试卷【全国百强校】北京101中学2018-2019学年下学期高一年级期中考试数学试卷2019届北京市十一学校高三下学期月考(2月)数学(理)试题(已下线)专题08 拿高分题目强化卷(第三篇)-备战2021年新高考数学分层强化训练(北京专版)2022届北京市房山区良乡中学高三模拟考试数学试卷北京理工大学附属中学2024届高三上学期数学10月练习试题河北省定州中学2018届高三下学期第一次月考数学试题2【全国百强校】上海市金山中学2018届高三上学期期中考试数学试题上海市上海师范大学附属中学2022届高三下学期3月月考数学试题(已下线)专题18 数列中的创新题的解法 微点1 数列中的创新题的解法