1 . 设数列
的前
项和为
.若对任意
,总存在
,使得
,则称
是“
数列”.
(1)若数列
,判断
是不是“
数列”,并说明理由;
(2)设
是等差数列,其首项
,公差
,且
是“
数列”,
①求
的值;
②设数列
,设数列
的前
项和为
,若
对任意
成立,求实数
的取值范围.
![](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/fe977dbfe794d737902609918f4dec63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0452453de77296c723e2f7fa7141f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc637439f68efdbd8fb7d3cb34109da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6a4365cf7df5d600c509d2f96e19f1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc5f454806ac8765b6759e41e68b191.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
②设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8320e148d883eea0bd90683bbdc43cff.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a1e3bf201a8f5edf12f462ab2a01fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe977dbfe794d737902609918f4dec63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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3卷引用:重庆市第一中学校2022-2023学年高二上学期期中数学试题
重庆市第一中学校2022-2023学年高二上学期期中数学试题广东省广州市华南师范大学附属中学2022-2023学年高二上学期阶段测试(二)数学试题(已下线)4.3.2 等比数列的前n项和公式(第2课时)(分层作业)-【上好课】2022-2023学年高二数学同步备课系列(人教A版2019选择性必修第二册)
2 . 已知等比数列
的公比为
,且
,数列
满足
,
.
(1)求数列
的通项公式.
(2)规定:
表示不超过
的最大整数,如
,
.若
,
,记
求
的值,并指出相应
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/844278bed099035561c35676cc642146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae5c8ddbded897a573025f1a4afc921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1675f4dba1775848597cf9782510cc.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)规定:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf813e9500eebd474511b865b876ea4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a6c086cd67c729ec094c21c0d45a5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2f2d7c81cb44416bcdf59419637682.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ef01144c122b5d7e51a1924ce9eeb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a84df7c41d43073de724ba8e077383b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa03a89b84919b99f7b58a2c0cd19775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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6卷引用:重庆市缙云教育联盟2022-2023学年高二下学期期末数学试题
重庆市缙云教育联盟2022-2023学年高二下学期期末数学试题2021年浙江省新高考测评卷数学(第三模拟)(已下线)专题20 数列综合-2020年高考数学母题题源全揭秘(浙江专版)(已下线)专题7.5 数列的综合应用(讲)- 2022年高考数学一轮复习讲练测(新教材新高考)(已下线)押全国卷(理科)第17题 解三角形与数列-备战2022年高考数学(理)临考题号押题(全国卷)(已下线)考点15 数列综合问题-2-(核心考点讲与练)-2023年高考数学一轮复习核心考点讲与练(新高考专用)
3 . 已知数列
的前
项和为
,且满足
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
________ ;若使不等式
成立的最大整数为10,则
的取值范围是________ .
![](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/443e59dd5c87765190549972933c09fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2815b24f5a89be7ae53aed93182e8988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcebf949a1dccb8daaf90da175fb273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
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4 . 已知数列{
}的首项为1,
为数列{
}的前n项和,
,其中q>0,
.
(Ⅰ)若
成等差数列,求数列{an}的通项公式;
(Ⅱ)设双曲线
的离心率为
,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549b17fd03994ba73f3341b7189fc01b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d726666f99a5a41dd673a2330e377b17.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168d1aaf6b99875b3c5c84882978e364.png)
(Ⅱ)设双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20e692bfc8107c4819e98af3f74c89db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f567549e66b339299dbf8369ab5812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17ceba8160ccefa3c4bccc749491dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7532aa134229978d1e36af60959d237.png)
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2016-12-04更新
|
4204次组卷
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7卷引用:重庆市育才中学2020-2021学年高二上学期10月月考数学试题
重庆市育才中学2020-2021学年高二上学期10月月考数学试题2016年全国普通高等学校招生统一考试理科数学(四川卷精编版)(已下线)专题14 数列综合-五年(2016-2020)高考数学(文)真题分项(已下线)专题19 数列的求和问题-十年(2011-2020)高考真题数学分项(已下线)考点21 数列求和问题-2021年新高考数学一轮复习考点扫描(已下线)2016年全国普通高等学校招生统一考试理科数学(四川卷参考版)专题28数列解答题
5 . 普林斯顿大学的康威教授于1986年发现了一类有趣的数列并命名为“外观数列”(Lookandsaysequence),该数列由正整数构成,后一项是前一项的“外观描述”.例如:取第一项为1,将其外观描述为“1个1”,则第二项为11;将11描述为“2个1”,则第三项为21;将21描述为“1个2,1个1”,则第四项为1211;将1211描述为“1个1,1个2,2个1”,则第五项为
,这样每次从左到右将连续的相同数字合并起来描述,给定首项即可依次推出数列后面的项.则对于外观数列
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24dd4c2c5dbcc394a2b4c5087be9dda1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.若![]() ![]() |
B.若![]() ![]() ![]() |
C.![]() |
D.若![]() ![]() |
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|
283次组卷
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2卷引用:重庆市第八中学校2023-2024学年高二上学期1月月考数学试题
6 . 如图,正方形
的边长为1,连接
各边的中点得到正方形
,连接正方形
各边的中点得到正方形
,依此方法一直进行下去.记
为正方形
的面积,
为正方形
的面积,
为正方形
的面积,……..
为
的前
项和.给出下列四个结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/6/c953b28a-410f-4e09-8ec2-bc4ac20a0ddb.png?resizew=142)
①存在常数
,使得
恒成立;②存在正整数
,当
时,
;③存在常数
,使得
恒成立;④存在正整数
,当
时,
其中所有正确结论的序号是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64a8012195f63ecbb610ba810a806103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64a8012195f63ecbb610ba810a806103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/6/c953b28a-410f-4e09-8ec2-bc4ac20a0ddb.png?resizew=142)
①存在常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ca7e3eede8f49b5aeec8f21dfe5411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f36a43e6b2660feaf82c88db905ede.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ccd4537f4dee2050ade38b972eb9b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/985dc26a89252b2e8dea815c529a2ffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4eadb6761fe3c3c8dde8bdb1631e40e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f555bcf970e76c33f66e2cbc4a11764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ef124353a6e8f7a699086e5fd8e329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ccd4537f4dee2050ade38b972eb9b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/985dc26a89252b2e8dea815c529a2ffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c751cf56508033b752972ffaec70121f.png)
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3卷引用:重庆市万州二中教育集团2023-2024学年高二下学期入学质量监测数学试题
重庆市万州二中教育集团2023-2024学年高二下学期入学质量监测数学试题北京市东城区2023-2024学年高二上学期期末统一检测数学试卷(已下线)第4章 数列 单元综合检测(难点)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
7 . 已知数列
:1,1,2,1,3,5,1,4,7,10,…,其中第1项为1,接下来的2项为1,2,接下来的3项为1,3,5,再接下来的4项为1,4,7,10,依此类推,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
A.![]() |
B.![]() |
C.存在正整数m,使得![]() ![]() ![]() |
D.有且仅有3个不同的正整数![]() ![]() |
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|
251次组卷
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3卷引用:重庆市第一中学校2023-2024学年高二下学期开学考试数学试题
8 . 已知在数列
中,
,
.
(1)求数列
的通项公式;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f589ae878d6c7db84123f542593644f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf3da897eb73b729f66bb0d700775c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
名校
解题方法
9 . 已知数列
中,
,
.
(1)求证:数列
是等比数列,并求数列
的通项公式
;
(2)若数列
满足
,且对任意正整数
,不等式
恒成立,求整数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf2a234b8102356b2c13a3c0b75a00e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ea8b581b1603be81ed816703fd486b.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad829a5b2345293e57f96b61e05f947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e02effa90824a5cf52fbbfc688410c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac19e2a797cd0a408316988a63b3755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70bc64496cf8c075d88502e2ffd64d7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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名校
解题方法
10 . 对于数列
,若
,则称数列
为“广义递增数列”,若
,则称数列
为“广义递减数列”,否则称数列
为“摆动数列”.已知数列
共4项,且
,则数列
是摆动数列的概率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb2fecac23d1f38bca02feba460a1a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf26d56d800370a7aa5a9ad8af19ab40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0da8dfdac6a516c744a2cda9e54c2e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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