1 . 已知数列
满足
,
,则
的整数部分是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c286f0bf939f0ec7abed0d75f414c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76be5c87dd8e20829874220f35f45e5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34bd1b650ddd204fb8783ab1406f3c94.png)
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2 . 基本不等式:对于2个正数
,它们的算术平均数不小于它们的几何平均数,即
,当且仅当
时,等号成立.可以推广到一般的情形:对于
个正数
,它们的算术平均数不小于它们的几何平均数,
.当且仅当
时,等号成立.若无穷正项数列
同时满足下列两个性质:①
;②
为单调数列,则称数列
具有性质
.
(1)若
;求数列
的最小项;
(2)若数列
的前
项和为
,判断数列
是否具有性质
,并说明理由;
(3)若
,求证:数列
具有性质
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0158862238e250d2a2598b7d4ecd148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140564fb2e11f8411e353d2fa73fbee9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b2fb1017d5dfe3a300de3e14a71b6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efff8ec14cb242e793afab4468bf2e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2617515e5ce81b3f5d9f4e806b21b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6879960be91ea52297d587e9a014f54a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17fac66473a039bdb47c2a248b0f4854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b9bb1963d176a00c82828c93ca0e2c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d013861990cf331c82eb453416ae31bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4247739746b8ddf1403541047e8b5580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ab0309e2cd35585ea9fb2cc3017abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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3 . 已知数列
中,
,
(
).
(1)求数列
的通项公式;
(2)若对于
,使得
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c4a4a9972b8fcc995c7e3f7da40a7d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7703a7fb5662c11ed45755b2454fb039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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解题方法
4 . 已知数列
的首项
,前n项和
满足
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eab8f8926b996f9bee57d96067f5bac.png)
__________ ;若
为递增数列,则m的取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999ac8c1ef39251e07a7fc54cbf7e26e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3668056d7f7e0c18cc3db6665aac401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eab8f8926b996f9bee57d96067f5bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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5 . 已知数列
满足
,
,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b293ef8b6f41032dd6016ce4defd9eab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
A.数列![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-02-13更新
|
837次组卷
|
3卷引用:重庆市南开中学校2022-2023学年高二下学期开学考试数学试题
重庆市南开中学校2022-2023学年高二下学期开学考试数学试题山东省德州市第一中学2023-2024学年高二下学期3月月考数学试题(已下线)微考点4-2 新高考新试卷结构数列的通项公式的9种题型总结
名校
解题方法
6 . 设数列
的前n项和为
,且
,若
,则下列结论正确的有( )
![](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/fd5c835c6ab2d6b245c78b5ae6c98800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e63378a8afe4d7e96cd4c2204a8e174.png)
A.![]() | B.数列![]() |
C.当![]() ![]() | D.![]() |
您最近一年使用:0次
2023-01-13更新
|
1013次组卷
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5卷引用:新疆乌鲁木齐市第一中学2022-2023学年高二下学期开学诊断性测试数学试题
新疆乌鲁木齐市第一中学2022-2023学年高二下学期开学诊断性测试数学试题吉林省长春吉大附中实验学校2022-2023学年高二上学期期末数学试题(已下线)专题04 数列的概念与等差数列(1)(已下线)专题4.1 数列(4个考点七大题型)(2)(已下线)专题1 数列的单调性 微点10 数列单调性综合训练
名校
解题方法
7 . 设
是数列
的前
项和,
,若不等式
对任意
恒成立,则
的最小值为( )
![](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/0ae9f834d8d546e7e5f9407724f56cc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515f1c1e7d53ea98217031df2f460ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28652e52c0b02a343e618935ea625cbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-11-15更新
|
1218次组卷
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8卷引用:重庆市第八中学校2023-2024学年高二下学期入学适应性训练数学试题
重庆市第八中学校2023-2024学年高二下学期入学适应性训练数学试题陕西省延安市2022-2023学年高二上学期期中理科数学试题湖南省长沙市四校2022-2023学年高二上学期期中联考数学试题(B卷)陕西省西安市第七十五中学2022-2023学年高二上学期期中理科数学试题广东省佛山市三水区三水中学2022-2023学年高二下学期第一次月考(3月)数学试题(已下线)专题6-1 数列函数性质与不等式放缩(讲+练)-1(已下线)【练】专题6 与数列有关的不等式恒成立问题(已下线)【练】专题1 数列的单调性问题
8 . 已知数列
中,
,数列
满足:
.
(1)求证:数列
是等差数列,并求数列
的通项公式;
(2)求
的值;
(3)求数列
中的最大项和最小项,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d61054cd9251ae9646d3dcbcf41efa28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19aec23982fb581ab92aa0dc4e254cad.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/185e26413d7faabfaf59114fe16c7b80.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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名校
解题方法
9 . 已知数列
满足
,数列
的前
项和为
,则下列结论错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ac5b24acb87be5e46d42c52a911ed02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
A.![]() |
B.数列![]() ![]() |
C.数列![]() |
D.![]() |
您最近一年使用:0次
2022-08-22更新
|
2273次组卷
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8卷引用:内蒙古通辽市重点校2022-2023学年高二下学期适应性考试数学(理)试题
内蒙古通辽市重点校2022-2023学年高二下学期适应性考试数学(理)试题北京师范大学第二附属中学2023届高三上学期8月返校检测数学试题1.3.3 等比数列的前n项和公式(同步练习基础版)上海市新中高级中学2023-2024学年高二上学期期中数学试题(已下线)专题04 数列(6)(已下线)第04讲 数列求和(练)福建省福州第十五中学2023届高三10月月考数学试题(已下线)三省三校2022届高三下学期第一次模拟数学(理)试题变式题6-10
名校
10 . 已知公比
的等比数列{
}满足
,
.若
,且数列
是递增数列,则实数
的取值范围是___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda6dc559d07bc22c9a0ed1e3a6d01d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b39cc367f89818f7633aa8038918b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40de9f0effdceb89b66f4a0868146ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01dea75cd25a2108fd0b58a77d3c42e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2022-03-28更新
|
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3卷引用:湖南省常德市临澧县第一中学2021-2022学年高二下学期入学考试数学试题
湖南省常德市临澧县第一中学2021-2022学年高二下学期入学考试数学试题河南省商丘市第一高级中学2022-2023学年高二下学期3月月考数学试题(已下线)专题1 数列的单调性 微点2 数列单调性的判断方法(二)——作差比较法、作商比较法