1 . 已知
是公差为2的等差数列.数列
满足
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d6638f7380be0277a375697644a964.png)
(I)求数列
和
的通项公式;
(Ⅱ)设
,数列
的前
项和为
,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/fe5007cf5afb87e8f4667438d7e3ce88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d6638f7380be0277a375697644a964.png)
(I)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af7860e024bd38f5c45a34d602d0d16.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1302abaebc9df026c2a83291063e83b4.png)
您最近一年使用:0次
2018-04-26更新
|
1367次组卷
|
4卷引用:四川省宜宾市第四中学校2019-2020学年高一下学期期中考试数学试题
13-14高一下·河北石家庄·期中
名校
2 . 已知等差数列{an}的前n项和为Sn,且a2=1,S11=33.
(1)求{an}的通项公式;
(2)设
,求证:数列{bn}是等比数列,并求其前n项和Tn.
(1)求{an}的通项公式;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7e6e2e198904f054456646f4352aa3b.png)
您最近一年使用:0次
名校
3 . 设等差数列
是无穷数列,且各项均为互不相同的正整数,其前
项和为
,数列
满足
.
(1)若
,求
的值;
(2)若数列
为等差数列,求
;
(3)在(1)的条件下,求证:数列
中存在无穷多项(按原来的顺序)成等比数列.
![](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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aecda4bee53fedd3ffa6498f7a122e4.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3e251690f97cf1bb5e1560696075db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(3)在(1)的条件下,求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
4 . 已知
是各项均为正数的等差数列,其前
项和为
,且
.
(1)求数列
的通项公式;
(2)若数列
的前
项和为
,且
,
.
①求证:数列
是等比数列;
②求满足
的所有正整数
的值.
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4578c02324ba73e61b82da2e1cc8458f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.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/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb73c1f21605711268e6c9f0a7bbb880.png)
①求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
②求满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070b130f085fd5afe165f3349fdedddb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
5 . 已知
为等差数列
的前
项和,且
,
.
(1)求数列
的通项公式;
(2)若
,求证:
;
(3)求数列
的前
项和
.
![](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/3f86a8746a583f411fb73c6334eb27b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6177d9bd04cd66a5c60728f64381c3e8.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7697ad2c34efe6f4ccc8fec73de0ad06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcecf845cf8d118f21462449643da0d1.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de6cca0659d178aff78f19fc141ec09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
解题方法
6 . 已知数列
的奇数项是公差为
的等差数列,偶数项是公差为
的等差数列,
是数列
的前
项和,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7826eb4aa860ff212f1bdc9ff310c901.png)
(1)若
,求
;
(2)已知
,且对任意的
,有
恒成立,求证:数列
是等差数列;
(3)若
,且存在正整数
,使得
,求当
最大时,数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](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/7826eb4aa860ff212f1bdc9ff310c901.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fceb89dab24237747cfceb6bde8cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e35eeaabd951fb09b2926807da3685b.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/412e3609c9490d61a3720ed638eae8df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a5945ce5c2114af8c18718ca8dc899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71a59fa91c73b84d74c8c3c8f33a0d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23203e6fe763edf125c6e168a6918587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db7584f54ec68298b29efb662a9a777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2017-06-23更新
|
502次组卷
|
4卷引用:江苏省南菁高级中学2016-2017学年高一下学期期中考试数学试题
江苏省南菁高级中学2016-2017学年高一下学期期中考试数学试题2020届江苏省南通市高三下学期4月高考模拟数学试题(已下线)考点47 推理与证明-备战2022年高考数学(文)一轮复习考点帮(已下线)4.2.2 等差数列前n项和2课时
10-11高一下·湖北宜昌·期中
7 . 本小题满分12分)已知等差数列
的前
项和
,且
.
(1)求
的通项公式;
(2)设
,求证:
是等比数列,并求其前
项和
.
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e431d92c5041fa44373c9df45c7309f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7e6e2e198904f054456646f4352aa3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2016-12-03更新
|
842次组卷
|
5卷引用:2010-2011学年湖北省长阳一中高一第二学期期中考试理科数学卷
(已下线)2010-2011学年湖北省长阳一中高一第二学期期中考试理科数学卷2014-2015学年福建省德化一中高一下学期期末质量检查数学试卷新疆自治区北京大学附属中学新疆分校2018-2019学年高一下学期期中考试数学试题(已下线)2011-2012学年度广东省中山一中高二期中理科数学试卷甘肃省庆阳二中2017-2018学年高二第一次月考数学试卷
10-11高一上·江西吉安·期末
8 . 数列
为等差数列,
为正整数,其前
项和为
,数列
为等比数列,且
,数列
是公比为64的等比数列,
.
(1)求
;
(2)求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f478acd1cb5b5a7f66d10b4f318d78d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7afef6271af7462ffa935a1846e3ec90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f56a6c48dfe9b1a169bc4239adf6b5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55e03428497ac0ea2aa80fe5bdcd939.png)
(2)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f1b287682688110f7d55800521bbc1.png)
您最近一年使用:0次
9-10高一下·福建·阶段练习
解题方法
9 . 已知等差数列
的公差为
,且
,数列
的前
项和为
,且![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/25b25545677245b0998be3e77d602c24.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/eea9dafd0a7c49b8a266c1f8c4a0981a.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/3e63c2e5530c4fdca7df8d4f1fdaa1b8.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/379be22056994624997a14a200a43505.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/cd7b635e8eb7485fa1a46c64d887ac4c.png)
(1)求数列
,
的通项公式;
(2)记
=
求证:数列
的前
项和
.
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/170e06a8e0234322938f569c7d94f443.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/054dca2818d449039cb6339f2c257f88.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/6da466c3032d430a8698768b50216d62.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/c8af9081d5f743a0bd56963140e6ebc7.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/d647d51144d54e7db702cf89dc14e68c.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/25b25545677245b0998be3e77d602c24.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/25b25545677245b0998be3e77d602c24.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/eea9dafd0a7c49b8a266c1f8c4a0981a.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/3e63c2e5530c4fdca7df8d4f1fdaa1b8.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/379be22056994624997a14a200a43505.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/cd7b635e8eb7485fa1a46c64d887ac4c.png)
(1)求数列
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/170e06a8e0234322938f569c7d94f443.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/c8af9081d5f743a0bd56963140e6ebc7.png)
(2)记
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/d42566e0c4234f1da474b4d120d4194d.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/99d5dacb93ac4ee89a75306775eeb51a.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/bc8ae3d6f42445d48484ae8c8a784ee5.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/d647d51144d54e7db702cf89dc14e68c.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747039379456/1569747044655104/STEM/25fd0bc8a5c148eca3bc76f8b4df6da7.png)
您最近一年使用:0次
真题
名校
10 . 设
是首项为
,公差为
的等差数列(
),
是前
项和. 记
,
,其中
为实数.
(1)若
,且
,
,
成等比数列,证明:
;
(2)若
是等差数列,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.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/fa50ba02896fb190ab6dc25bc529bc73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a783088120d67cc98936081e80fb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a548938d87c80ac47910607d3857007f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72b5247f5373c52fe795e2f0418ded69.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a783088120d67cc98936081e80fb7f.png)
您最近一年使用:0次
2016-12-02更新
|
2771次组卷
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10卷引用:2013-2014学年江西省吉安一中高一下学期第一次段考数学试卷
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