1 . 已知数列
各项都是正数,
,对任意n∈N*都有
.数列
满足
,
(n∈N*).
(1)求数列
,
的通项公式;
(2)数列
满足cn=
,数列
的前n项和为
,若不等式
对一切n∈N*恒成立,求
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/f2d21cd74d4e7072129d76b61c81f25b.png)
![](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/f23f7f601ad9971d3de3e2dd820642e9.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ddd0b30a1a41a65bb399f981b4cdcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813c597df06b65bf82889a3fcc1991c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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8卷引用:四川省绵阳南山中学2021-2022学年高二上学期入学考试数学试卷
四川省绵阳南山中学2021-2022学年高二上学期入学考试数学试卷四川省绵阳南山中学2021-2022学年高二上学期入学考试数学试题(已下线)第04讲 数列求和(练)福建省厦门外国语学校2023届高三上学期第一次月考数学试题福建省三明第一中学2023届高三上学期期中考试数学试题(已下线)湖南省株洲市2023届高三下学期一模数学试题变式题17-22(已下线)重难专攻(五) 数列中的综合问题(讲)江西省赣州市第四中学2022-2023学年高二下学期期中数学试题
名校
解题方法
2 . 数列
满足
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675ca921471d74dc79b6428c6c792bc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f29495b1c0177d7ab56c3cbee58096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0479c8b9e0422e212d84d189f68ffe97.png)
A.4 | B.![]() | C.![]() | D.![]() |
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2卷引用:四川省绵阳中学2022-2023学年高二上学期入学考试数学(文)试题
名校
解题方法
3 . 已知数列
的前
项和为
,若
,且对
,
都有
,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/550904843e7d2f286f7a72997cd21393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c68b253787b7980d259a243ee42ecfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f18758458367e71b24e718347d02e42.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2卷引用:四川省内江市第六中学2023-2024学年高二下学期入学考试数学试题
4 . 已知数列
是等比数列,则下列结论:①数列
是等比数列;②若
,
,则
;③若数列
的前n项和
,则
;④若
,则数列
是递增数列;其中正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/362832fa3d3c13c1eafd565349d66dce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb334e165679c6cb500c994cffa47147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1633804d72236554a063e291d473758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab034c52723d0c57355408a6ef40e685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ed6c0834dd802b069f587558ec057d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df98d777481d5704afa790b2f2abbd7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29719d33af813b84dae0191ae5c92a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5卷引用:四川省仁寿第一中学校南校区2023-2024学年高三上学期第一次调研考试文科数学试题
5 . 已知
是等差数列
的前
项和,则下列结论正确的是( )
![](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)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3卷引用:四川省眉山市北外附属东坡外国语学校2023-2024学年高二下学期开学考试数学试题
6 . 已知数列
各项都是正数,
,对任意
都有
.数列
满足
,
.
(1)求数列
,
的通项公式;
(2)数列
满足
,数列
的前
项和为
,若不等式
对一切
恒成立,求
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/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f11fe9c37b3e0457d6a8cbc7da0e12.png)
![](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/b7fc42ff08c230c7924635a426af797b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94b8d581526f7110c972e791f073d5b.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/3b1c614c2cff112cba29d9bbef30b6e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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3卷引用:四川省广安市武胜烈面中学校2021-2022学年高二上学期数学(文)入学考试试题
7 . 在①
,
,
成等差数列,且
;②
,且
;③
(
为常数)从这三个条件中任选一个补充在横线处,并给出解答.
问题:已知数列
的前
项和为
,
,___________,其中
.
(1)求
的通项公式;
(2)记
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22d144b564ca92fae36a5f454952553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43dd99d0e1e08bb6b2fd30d18756b26d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947079197c36e5cfbf651ec6eb00bcd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd67b44effae70835c7db55783f6b45c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c16db7cc57898a6eb3146b19128ae63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
问题:已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67fd0eb54561cd1df683a08cf049bfc.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/14835bf3f00139ccec0694d0924db795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67fd0eb54561cd1df683a08cf049bfc.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73fddc7138f5839173ddbe76fbca30a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52c9237cb0b4acc568d4afb12997186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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9卷引用:四川省成都市树德中学2021-2022学年高三上学期入学考试文科数学试题
四川省成都市树德中学2021-2022学年高三上学期入学考试文科数学试题四川省成都市树德中学2021-2022学年高三上学期入学考试理科数学试题四川省成都市青羊区树德中学2021-2022学年高三上学期数学(文)入学考试试题四川省成都市青羊区树德中学2021-2022学年高三上学期数学(理)入学考试试题四川大学附属中学2022--2023学年高三上学期期中(半期)考试数学文科试题江苏省苏州实验中学2021-2022学年高二10月份调研数学试题(已下线)第20讲 数列的通项公式-2022年新高考数学二轮专题突破精练2023版 苏教版(2019) 选修第一册 突围者 第4章 第三节 课时2 等比数列的前n项和2023版 苏教版(2019) 选修第一册 名师精选卷 第十一单元 等比数列 B卷
名校
解题方法
8 . 已知
是数列
的前
项和,
.
(1)求
的通项公式;
(2)若
,求数列
前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be425167c4cf003028d17267a0eade2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143e5b62002dc80525a18d5aec8d7987.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be425167c4cf003028d17267a0eade2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/584911ef68bef907faf3470fed90d4e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492959aeba0d544206bf06dcc875d5e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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3卷引用:四川省眉山市仁寿第一中学南校区2021-2022学年高二上学期入学考试数学试题
9 . 已知数列{an}的前n项和为Sn,且Sn=2an
.
(1)证明:数列{an}是等比数列;
(2)设bn=(2n
)an,求数列{bn}的前n项和Tn.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
(1)证明:数列{an}是等比数列;
(2)设bn=(2n
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
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8卷引用:四川省阆中中学2020-2021学年高三上学期开学考试数学(理)试题
四川省阆中中学2020-2021学年高三上学期开学考试数学(理)试题四川省成都市玉林中学2023-2024学年高二下学期4月诊断性评价数学试题福建省福州市2018届高三上学期期末质检数学(文)试题安徽省定远重点中学2019届高三上学期期末考试数学(文)试题【全国百强校】北京师大实验中学2019届高三3月份高考模拟文科数学试题(已下线)专题04 数列求和(知识串讲)-2020-2021学年高二数学重难点手册(数列篇,人教A版2019选择性必修第二册)(已下线)第19节 数列求和江西省抚州市金溪县第一中学2023届高三上学期第二次月考数学(文)试题
10 . 已如数列
前n项和为
,若
,且
成等差数列.
(1)求证:数列
是等比数列;
(2)记数列
的前n项和为
,求证:
.
![](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/40f4e1236d7dc0366d9523d0cbb426be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa0e37d42487100c23f90d157d0ff710.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088948ca1970056aa2774a1904313a92.png)
(2)记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088948ca1970056aa2774a1904313a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d52dfd8c8f345d041dab12712445d96.png)
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