1 . 在①
,②
,③
这三个条件中任选一个,补充在下面问题中,若问题中的
存在,求
的值;若
不存在,说明理由.
设数列
的前
项和为
,首项
,________,数列
是等比数列,
,
,是否存在
,使得对任意的
,恒有
?
注:如果选择多个条件分别解答,按第一个解答给分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cb8f0db1b16bff4310b82e06006562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f735f0cb810bcfce7af5070eb6dc0e06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30668c570dc62ca43bc1b9d7fb256ae9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
设数列
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a24e6bcf49b8e45531a2d4e4c70c181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e1b6ac5f7d668d4b672c5392cd104a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209559aca6bf32705588b6a40e0b7320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff686cac9060726d360ca863fbb81cea.png)
注:如果选择多个条件分别解答,按第一个解答给分.
您最近一年使用:0次
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解题方法
2 . 已知函数
,数列
满足
.
(1)求数列
的通项公式;
(2)判断数列
的单调性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3454c5743d2beb32064f0fe15d8df07f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e4a650c6246c8175ca5247ccc33a9c.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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名校
3 . 设数列
的前
项和为
.已知
.
(1)求证:数列
为等差数列,并求出其通项公式;
(2)设
,又
对一切
恒成立,求实数
的取值范围;
(3)已知
为正整数且
,数列
共有
项,设
,又
,求
的所有可取值.
![](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/534de09e80dba6dbfffea53bdb74649f.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb517e8e8a582aeb9c17eab852a630a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92f13e7c0b421f704dc0e6fad0c5a215.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c972cbd63decec197aec1bdc306de67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5631bc01b998a4b3fabd9e131699dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/effd163f8b1a235eb67227956e3652e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44f1512cee17305b8936f6c61b0a22b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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4 . 设数列
的首项
为常数,且
.
(1)判断数列
是否为等比数列,请说明理由;
(2)若数列
是递增数列,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1d2ca577acd12fcb397dc2e6ee00f7.png)
(1)判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e1c06829bf8a351bf0d2d29d2889f1.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
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名校
解题方法
5 . 等比数列
的前n项和
,数列
满足
.
(1)求a的值及
的通项公式.
(2)求数列
的前n项和.
(3)求数列
的最小项的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f7bc2dcf8b8829cdd5bae0e7cde1875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a77ead0a9c63271d2efffe3014184d.png)
(1)求a的值及
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c5c2d777efa6bd6e832b5755f8e436.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2767882820f4ba0defde0e412adb747f.png)
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6 . 设数列
的前
项和为
,且
,
.
(1)求
的通项公式;
(2)设
,若对所有的
,都有
,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/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b879217db06a5dc2b1c45a37e6dfaaa.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937a185bb2679b862bd5101f5b5c3be4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d136863d6beae5098ba2150334ddf235.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2021-09-20更新
|
588次组卷
|
4卷引用:人教B版(2019) 选修第三册 一蹴而就 高考模拟测试卷
人教B版(2019) 选修第三册 一蹴而就 高考模拟测试卷苏教版(2019) 选修第一册 必杀技 第四章 第4.3节综合训练(已下线)第4章 数列单元检测卷-2021-2022学年高二数学尖子生同步培优题典(苏教版2019选择性必修第一册)人教B版(2019) 选修第三册 必杀技 第五章 第5.3节综合训练
解题方法
7 . 设数列
是公比小于1的正项等比数列,
为数列
的前
项和,已知
,且
,
,
成等差数列.
(1)求数列
的通项公式;
(2)若
,且数列
是单调递减数列,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](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/05208bb4ab07cbbac0b0c6390e155d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d93c1ae7b22099a5d4c1c4241e5ca18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/713ee33258d96d760742c77f7b4b5422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
8 . 已知数列
中,
,
.
(1)证明:数列
和数列
都是等比数列;
(2)若数列
的前
项和为
,令
,求数列
的最大项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed75a3555a9966373b94f8e04df13513.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e575361303595eb25710553337bb2708.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf637cca53efd4b054a5cbcdb1f15caa.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b393a49eb5ae4a64537fa693570ab8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
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2022-09-08更新
|
828次组卷
|
4卷引用:河南省南阳市第一中学2017-2018学年高二上学期第三次月考数学(理)试题
名校
解题方法
9 . 在数列{an}中,a1=1,3anan-1+an-an-1=0(n
2,n∈N*).
(1)证明:数列
是等差数列;
(2)求数列{an}的通项公式;
(3)若λan+![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7e761be88728b3db50c2abd4377c12.png)
λ对任意的n
2恒成立,求实数λ的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e119c508fd265e3e3d78749e54fe4f43.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
(2)求数列{an}的通项公式;
(3)若λan+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7e761be88728b3db50c2abd4377c12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e119c508fd265e3e3d78749e54fe4f43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e119c508fd265e3e3d78749e54fe4f43.png)
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2021-11-21更新
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8卷引用:人教A版(2019) 选择性必修第二册 过关斩将 第四章 数列 4.2 等差数列 4.2.1 等差数列的概念
人教A版(2019) 选择性必修第二册 过关斩将 第四章 数列 4.2 等差数列 4.2.1 等差数列的概念江苏省苏州市高新区第一中学2021-2022学年高二上学期期初考试数学试题人教B版(2019) 选修第三册 突围者 第五章 第二节 课时1 等差数列苏教版(2019) 选修第一册 一蹴而就 第4章 4.2.2 等差数列的通项公式(已下线)4.2.1-4.2.2 等差数列的概念及通项公式(课堂培优)-2021-2022学年高二数学课后培优练(苏教版2019选择性必修第一册)(已下线)第三课时 课后 4.2.1.1等差数列的概念与通项公式2023版 湘教版(2019) 选修第一册 过关斩将 第1章 1.2.1等差数列及其通项公式+1.2.2等差数列与一次函数北京名校2023届高三一轮总复习 第5章 数列 5.2 等差数列
10 . 若数列{an}满足n≥2,n∈N*时,an≠0,则称数列
为{an}的“L数列”.
(1)若a1=1,且{an}的“L数列”为
,求数列{an}的通项公式;
(2)若an=n+k﹣3(k>0),且{an}的“L数列”为递增数列,求k的取值范围;
(3)若
,其中p>1,记{an}的“L数列”的前n项和为Sn,试判断是否存在等差数列{cn},对任意n∈N*,都有cn<Sn<cn+1成立,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9beaf2c4ef475a0c116c808b5bc82d72.png)
(1)若a1=1,且{an}的“L数列”为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d912747504ebb75aa4f4b04ba37bb6a.png)
(2)若an=n+k﹣3(k>0),且{an}的“L数列”为递增数列,求k的取值范围;
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3a0bda3aab83e85ba07b7b5d06f9f8c.png)
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2021-10-22更新
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5卷引用:江苏省南京市2020届高三下学期6月第三次模拟考试数学试题
江苏省南京市2020届高三下学期6月第三次模拟考试数学试题(已下线)数学-6月大数据精选模拟卷01(上海卷)(满分冲刺篇)江苏省苏州第十中学2021-2022学年高二上学期10月段考数学试题江苏省苏州市第十中学2022-2023学年高二数学10月阶段检测数学试题(已下线)考向18 数列不等式-备战2022年高考数学一轮复习考点微专题(上海专用)