1 . 已知数列
满足
.
(1)计算
,并求出数列
的通项公式;
(2)设
,
为数列
的前
项和,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/894aaec56149f880c7cf2bbc0f358d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417737573dde212a9b16e8faff6b398f.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe61d313eeca8ba47478a9de40540db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/894aaec56149f880c7cf2bbc0f358d2b.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29ee83dfef76fa4425a09ee8152b2b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f1ce1d77a0a00432fccf2a0b3b85dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5737f1f9cad2471f3ca53241b25a1eb9.png)
您最近一年使用:0次
名校
解题方法
2 . 已知首项为1的递增的等差数列
的前n项和为
,若
成等比数列.
(1)求
和
;
(2)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/37c0609f48ac7e62a55034ddd1be679d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8547379b2709230dfa6f4e52462c9b0a.png)
您最近一年使用:0次
2022-07-20更新
|
328次组卷
|
2卷引用:云南省普洱市2021-2022学年高二下学期期末考试数学试题
名校
解题方法
3 . 已知正项等差数列
,
,且
,
,
构成等比数列.
(1)求数列
的通项公式;
(2)设数列
的前n项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afbfd6b761451716ba3d7130c93497ea.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/d1a05feb0cc8f37effea9e72726ced58.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba57c83d526ac308d1461e80fcca9f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ab3b747e31fd1f95af4961b7b6a8bd.png)
您最近一年使用:0次
名校
解题方法
4 . 已知数列
为正项等比数列,
;数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0796b7733ada9674e3658a77cbcb1770.png)
.
(1)求
;
(2)设
的前
项和
,求证:
.
![](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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0796b7733ada9674e3658a77cbcb1770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882e9ffd82b2f76b774980a24d485409.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da72309d2507e2f5e5ed88d8cc08963.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/f1cb91e89800a81f4d62ed75c3ace24a.png)
您最近一年使用:0次
2022-11-15更新
|
489次组卷
|
2卷引用:福建省安溪一中、养正中学、惠安一中、泉州实验中学2023届高三上学期期中联考数学试题
5 . 设各项均为正数的数列
满足
.
(1)若
,求数列
的通项公式;
(2)在(1)的条件下,设
,数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb52c0bf7e2ead6e697fad50bae8497d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)在(1)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/273c6f670d0786ae631b275aecb91abd.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/2c26df91e8fbf63818e9c58d4eda0504.png)
您最近一年使用:0次
6 . 已知数列
的前
项和为
,且
.
(1)求证;数列
是等比数列;
(2)求证:
.
![](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/c9d416aa2d2e0415f6b3a663ccc3772e.png)
(1)求证;数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2de706dc5f0439b989273a5367f63a.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a0efd37ab066a4d3490dc8fbd4fc820.png)
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2022-11-21更新
|
945次组卷
|
5卷引用:江西省九江市十校2023届高三上学期11月联考数学(文)试题
名校
解题方法
7 . 记数列
前
项和为
,
.
(1)证明:
为等差数列;
(2)若
,记
为数列
的前
项积,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd9aa5ea928f401f91440cfa7870c83.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/6758a2c4afd686c2da7d49a278d2b297.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd9aa5ea928f401f91440cfa7870c83.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d865df66f21148823365db8186d87d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22c302a108bd4c05d5b28de5e43a9092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd9aa5ea928f401f91440cfa7870c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dac95118f121dee7d41e33c7415d5006.png)
您最近一年使用:0次
2022-09-23更新
|
1019次组卷
|
4卷引用:“西南汇”联考2022-2023学年高三上学期开学考试文科数学试题
“西南汇”联考2022-2023学年高三上学期开学考试文科数学试题“西南汇”联考2022-2023学年高三上学期开学考试理科数学试题(已下线)专题05 数列放缩(精讲精练)-1(已下线)第6讲 数列的通项公式的11种题型总结(3)
名校
解题方法
8 . 已知等差数列
的前
项和为
,公差
不等于零,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27680b35dac88ecaf3fff70ac3a8a9a8.png)
(1)求数列
的通项公式;
(2)设
,求证
(
且
)
![](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/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b40aecc20688c3264708a58ea95dc4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27680b35dac88ecaf3fff70ac3a8a9a8.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98140638c614f73c82e680469948c700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9adb7bafaff17eca97088580445f47b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
您最近一年使用:0次
2022-11-05更新
|
860次组卷
|
2卷引用:湖南省长沙市一中等名校联考联合体2022-2023学年高三上学期11月联考数学试题
9 . 已知数列
的首项
,且满足
.
(1)求证:数列
为等比数列;
(2)设数列
满足
求最小的实数m,使得
对一切正整数k均成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc6545b8eca1c4223ed701a199a85683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7643e8b7aa32ebf299048417a94432dc.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213e22890204937a5dded4436369390f.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54597b58e4ba54fb4f77423e4fb08b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de13c57bc94bc8e1c271f02d684a3c11.png)
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2022-11-18更新
|
1164次组卷
|
3卷引用:湖南师范大学附属中学2022-2023学年高二上学期期中数学试题
10 . 设数列
满足
,且
.等差数列
的公差d大于0.已知
,且
成等比数列.
(1)求证:数列
为等差数列,并求
的通项公式;
(2)求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82a04834a4a762af61c479b77ba0875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3938fc9093a10b040b5ed9d18c876637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/872801b696ea574128161f6e2a32ccbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d80ba638cb8ff50702efa973794d76.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82c65a855b1eed9c43e6829f6c3bffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da72309d2507e2f5e5ed88d8cc08963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2022-11-17更新
|
810次组卷
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4卷引用:黑龙江省佳木斯市第一中学2022-2023学年高三上学期第三次调研数学试题
黑龙江省佳木斯市第一中学2022-2023学年高三上学期第三次调研数学试题重庆市南开中学校2022-2023学年高二上学期网课质量检测数学试题(已下线)山东省青岛第二中学2022-2023学年高三上学期1月期末测试数学试题变式题17-22重庆市江北区字水中学2023-2024学年高二上学期第一次月考数学试题