1 . 已知数列
的前
项和为
,且
,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/c691ff36c55147359710dfdfb334d410.png)
A.![]() | B.数列![]() |
C.数列![]() ![]() | D.数列![]() |
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3卷引用:江苏省苏州大学2024届高考新题型2月指导卷数学试题
名校
解题方法
2 . 已知正项数列
满足:对任意正整数
,都有
成等差数列,
成等比数列,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e719bd380ea9dd3ec2a20242bdf6380.png)
(1)求证:数列
是等差数列;
(2)设数列
的前项和为
,如果对任意正整数
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0197eeeeaafec6b1fdd7bb8509572f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a20dfd9c14d834c66b2070c41f66eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5b55761181faa05961286eedfebca4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e719bd380ea9dd3ec2a20242bdf6380.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4f93dca4192c87d1ac77a2456bf12e.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b01041691ad489f126f05c18ea8f0fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd0dc83494c84b81687cf8c38736b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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解题方法
3 . 已知正项等比数列
首项为
,且
,
,
成等差数列,则
前
项和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b6fae41755ecb64ac239a5a2d767354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:江西省上饶市余干县新时代学校2024届高三上学期1月考试数学试题
江西省上饶市余干县新时代学校2024届高三上学期1月考试数学试题(已下线)考点7 等差、等比数列的联姻 2024届高考数学考点总动员【练】天津市武清区河西务中学2023-2024学年高二上学期第三次统练数学试卷
名校
解题方法
4 . 设正项等比数列
,
,且
、
的等差中项为
.
(1)求数列
的通项公式;
(2)若
,数列
的前
项为
,数列
满足
,
为数列
的前
项和,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f6f4ba1e5066398afcb418d6513a0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df9f0dd14319369f058a0e358f704e9.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70fe18a3d0e5cb68bd397469f93f4728.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf682eb189ae0c0d14b1cf2f2f2efb56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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|
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5 . 已知公比不为1的等比数列
的前n项和为
,且
成等差数列.
(1)求数列
的公比;
(2)是否存在r,s,
且
使得
成等差数列?若存在,求 出r,s,t的关系; 若不存在,请说明理由.
![](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/a86175f13495075015cb36339760680b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)是否存在r,s,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfcf026d09f045f7e503e71965fb89e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36035e03bd0a4d9159a5ecf5b96bc22a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40099bee320fb374fc06dea60c939a35.png)
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解题方法
6 . 各项均为正数的等比数列
的前
项和为
,且
,
,
成等差数列,若
,则
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.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/cfaca09f4558cc263c62abd9f461683d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049cbc3e23ca095e9a542a3401066673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9620357ea5be4037cfdccd09a27d3862.png)
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7 . 已知等差数列
的前n项和为
,满足
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64e2f80dfb83790c10fe76655cf0f17.png)
______________ .
![](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/dc4736baf488b235b9f26ca6e518bbff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c834d17a85cfad3b12f2869b13aa2cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64e2f80dfb83790c10fe76655cf0f17.png)
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湖南省常德市第一中学2024届高三上学期第四次月考数学试题(已下线)考点3 等差列的前n项和及其性质 2024届高考数学考点总动员上海市莘庄中学2023-2024学年高二上学期10月月考数学试题(已下线)4.2 等差数列(4)(已下线)第03讲 4.2.2等差数列的前 项和公式(1)(已下线)4.2.2 等差数列的前n项和公式(8大题型)精讲-2023-2024学年高二数学题型分类归纳讲与练(人教A版2019选择性必修第二册) (已下线)4.2.2 等差数列的前n项和公式——课堂例题
名校
8 . 已知等差数列
,其前n项和
满足
,则
( )
![](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/5a5cc4661d2987ec7dafa64d78ac6e99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d9cd723a162ac33b06d1869bbd9cb5.png)
A.4 | B.![]() | C.![]() | D.3 |
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广东省2024届高三上学期新高考联合质量测评9月联考数学试题四川省绵阳南山中学实验学校2023-2024学年高三上学期9月月考数学(理)试题广东省深圳市南头中学2024届高三上学期第二次月考数学试题陕西省汉中市2023-2024学年高三上学期第三次校际联考文科数学试题陕西省汉中市2023-2024学年高三上学期第三次校际联考理科数学试题广东省梅州市蕉岭县蓝坊中学2023-2024学年高三上学期第三次质检数学试题山东新高考联合质量测评2023-2024学年高三上学期9月联考数学试题四川省绵阳市三台县三台中学校2024届高三一模数学(理)试题(二)(已下线)4.2.2等差数列的前n项和公式(第2课时)(导学案)-【上好课】高二数学同步备课系列(人教A版2019选择性必修第二册)
名校
9 . 已知等比数列
中
,若
成等差数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e190fa9d30fe745b04fdd644d30719c9.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d8cf1b453e25c5f71a0510ed41c0b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e190fa9d30fe745b04fdd644d30719c9.png)
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10 . 若m,n是函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334ef69ed56313ac29b58b44a7e278e8.png)
的两个不同零点,且m,n,
这三个数可适当排序后成等差数列,也可适当排序后成等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b603db6355be66287b5ee3478ef8d2.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334ef69ed56313ac29b58b44a7e278e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8bc8ee1d7c97ed4448c47d8899d5be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b603db6355be66287b5ee3478ef8d2.png)
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