名校
解题方法
1 . 已知数列{an}的前n项和为Sn,2Sn+2n=an+1﹣2,a2=8,其中n∈N*.
(1)记bn=an+1,求证:{bn}是等比数列;
(2)设
为数列{cn}的前n项和,若不等式k>Tn对任意的n∈N*恒成立,求实数k的取值范围.
(1)记bn=an+1,求证:{bn}是等比数列;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f4f0a553f930bb7d2688704c6631907.png)
您最近一年使用:0次
名校
解题方法
2 . 已知数列
满足:
,
.
(I)求证:数列
是等比数列;
(II)设
的前
项和为
,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2f0ce5532f83e0ae73d0410e818334.png)
(I)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345edc602f5c52122b91e6864902fb8a.png)
(II)设
![](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/1e583e5b521b9f7427560078dd8e7906.png)
您最近一年使用:0次
2018高三·全国·专题练习
名校
3 . 已知数列
的前
项和为
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c112bf83905ff9bc55b19c7b657c0845.png)
(1)设
,求证:
是等比数列;
(2)求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c112bf83905ff9bc55b19c7b657c0845.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455ff770b2ec02c52401dbbfcd20d4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cca3ebd10a38201939a3694cc95186a.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
您最近一年使用:0次
2019-01-04更新
|
552次组卷
|
5卷引用:5-3 等比数列及其前n项和(高效训练)-2019版导学教程一轮复习数学(人教版)
(已下线)5-3 等比数列及其前n项和(高效训练)-2019版导学教程一轮复习数学(人教版)广西贺州市平桂高级中学2020-2021学年高二上学期第一次月考数学试题(已下线)第41讲 等比数列黑龙江省牡丹江市第三高级中学2022-2023学年高二下学期期中数学试题江苏省扬州市宝应县曹甸高级中学2024届高三上学期第三次月考数学试题
名校
4 . 已知非零数列
的递推公式为
,
.
(1)求证数列
是等比数列;
(2)若关于
的不等式
有解,求整数
的最小值;
(3)在数列
中,是否一定存在首项、第
项、第
项
,使得这三项依次成等差数列?若存在,请指出
所满足的条件;若不存在,请说明理由.
![](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/93e46c38bbc19b1b826ee6df3da462d1.png)
(1)求证数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5971cda748462d6125bb222e69e88a0.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142591a242267647d5f421f7cb7bc0bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)在数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/367ab0dd327678b2d9175da7f3374d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ca4edd307291763fe5383189678b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f551b3d2a243c5b1fa918a7be13490b.png)
您最近一年使用:0次
2020-01-07更新
|
398次组卷
|
2卷引用:上海市曹杨二中2017-2018学年高二上学期期中数学试题
名校
解题方法
5 . 已知数列
的前
项和为
,
,
.数列
满足
,
.
(1)求数列
的通项公式;
(2)是否存在正实数
,使得
是等比数列?并说明理由.
![](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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/659a3959bab366f4723192294706184a.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/506b8a04f88fb488d6521347e8ef2a1a.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)是否存在正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
6 . 已知数列
,
的前
项和分别为
,
,且
,
,
.
(1)求
,
的通项公式;
(2)求证:
.
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a56efefe3a82c68146c808a4e7ba8e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1069f6687a41501db0a0010237ba06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26169c06e403eebdc0c3ddb42f57dee.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b692cace94f088567b07563ac71c46.png)
您最近一年使用:0次
解题方法
7 . 已知数列{
}满足
,且
.
(I)证明:数列{
}是等比数列;
(II)求数列{
}的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320db76ae60f2cfba634876b93390894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
(I)证明:数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf6acff4900b76f30f791615b50437d7.png)
(II)求数列{
![](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)
您最近一年使用:0次
名校
8 . 已知数列
的前
项和为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7419eab350c5266ebd58156ea7e43a.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e775830200f746e6b94c7e87454f3aa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7419eab350c5266ebd58156ea7e43a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-09-13更新
|
501次组卷
|
3卷引用:黑龙江省齐齐哈尔市2018-2019学年高一下学期期末考试数学试题
解题方法
9 . 已知数列
满足:
,
.
(1)求数列
的通项公式;
(2)数列
满足数列
的前n项和为
,求数列
的前n项和.
![](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/289167cec314702689ccc2778726ef28.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a6c852d593cb9f6bdfd9eeddb50fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae30c3260ba1365e279bceecb27d2538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
10 . 设数列
的前
项和
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9bbe98100c8067ff36ac536d043a85.png)
_______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9620357ea5be4037cfdccd09a27d3862.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd852c47bb16b177976bea262cb4828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9bbe98100c8067ff36ac536d043a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9620357ea5be4037cfdccd09a27d3862.png)
您最近一年使用:0次