解题方法
1 . 已知数列
的前
项和为
,
,满足
.
(1)计算
,猜想
的一个表达式(不需要证明)
(2)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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0a53b6755b419e78cb64cc193ce826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8489821754dcda77ce79ad337f27206.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf4e20ea341827ce5f9552daee39462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd44027bdc6a6e4e5fa2168c34f50dc3.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0358e59b474fd18fac4797f3506a0ac.png)
您最近一年使用:0次
2016-12-03更新
|
354次组卷
|
2卷引用:2015-2016学年吉林省扶余市一中高二上学期期中考试理科数学试卷
2 . 已知函数
(
是自然对数的底数,
).
(I)证明:对
,不等式
恒成立;
(II)数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d70266454df40256268b19b055a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d218992d1942266d7208e476d0c4100.png)
(I)证明:对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a6a4357fbdb4015810df156e1ed559.png)
(II)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfbae2b0b08f55a23cea77f388381276.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/21a7305b8d7a0930e10b454e3a48bbd5.png)
您最近一年使用:0次
名校
解题方法
3 . 设正项数列
的前
项之和
,数列
的前
项之积
,且
.
(1)求证:
为等差数列,并分别求
的通项公式;
(2)设数列
的前
项和为
,不等式
对任意正整数
恒成立,求正实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed7e353a1e0f1d61821001534804b8bd.png)
![](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/df1dcb436cf720db0285529da3f293e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c5175f3097ba91a11fc64feb1f272c1.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7beab436573a07265d00e1a7dcade75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55816affb2df65b2e5f57d07cccbb476.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4f219354fcccd0fd79e519656139979.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/80f731f41982c861b2949e21daeb10bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2024-04-18更新
|
229次组卷
|
2卷引用:吉林省长春市第二实验中学2023-2024学年高二下学期4月月考数学试题
4 . 已知等差数列
的前
项和为
,且
.
(1)求数列
的通项公式;
(2)数列
满足
,令
,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/3dfa129c3f8f9d41cc175c9c23790ed7.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/4995fa0403e013d888c0935ebfe15024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9356245b78a281f18b5d0d618e5387f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f6e795a55ff3ecd973858aadd9ff05.png)
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2024-05-04更新
|
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2卷引用:吉林省长春市实验中学2024届高三下学期对位演练考试数学试卷(一)
名校
解题方法
5 . 已知正项数列的前
项和
,满足:
.
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/546e12c898d812317d8e453f140b9c73.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d083a7a5538ad18ca1780f28a183cfe.png)
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2023-11-09更新
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4394次组卷
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9卷引用:吉林省延边州2024届高三下学期教学质量检测一模数学试题
吉林省延边州2024届高三下学期教学质量检测一模数学试题湖北省部分重点中学2024届高三上学期第一次联考数学试题(已下线)第五篇 专题7 逆袭90分综合模拟训练(七) (已下线)专题01 数列大题(已下线)专题5-3数列求和及综合大题归类-1(已下线)黄金卷01(已下线)题型17 5类数列求和浙江省武义第一中学2023-2024学年高二上学期1月检测数学试题(已下线)专题06 数列
6 . 若数列
的前
项和
满足
.
(1)证明:数列
是等比数列;
(2)设
,求数列
的前
项和
.
![](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/312fddeb97c72b0aa3a0408dfdc2f067.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c895d4ce5ce82ef9b311b9369b4de11.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b60ee7a54a255800d1a6156b4fa0f20e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ae722578522dc4e2bae41f93db8e38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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4卷引用:吉林省长春市绿园区长春市文理高中2023-2024学年高二下学期4月月考数学试题
名校
解题方法
7 . 已知数列
的前n项和为
,
,
,且当
时,
.
(1)求
;
(2)设数列
的前n项和为
,证明:
.
![](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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47dce0a1fe55239f8017915d53669ecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8619c6f5807665a8b025c9839b98d6d6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02e80983b88cdf6b540502816c87d13.png)
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2024-04-03更新
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4卷引用:吉林省通化市梅河口市第五中学奥赛班2023-2024学年高二下学期4月月考数学试题
吉林省通化市梅河口市第五中学奥赛班2023-2024学年高二下学期4月月考数学试题四川省百师联盟2024届高三冲刺卷(三)全国卷文科数学试题(已下线)第一章数列章末十六种常考题型归类(3)(已下线)云南、广西、贵州2024届“3+3+3”高考备考诊断性联考(二)数学试题变式题16-19
解题方法
8 . 已知数列
是公差为正数的等差数列,且
,
.
(1)求
的通项公式;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c133f850a40f4d23c30fa91a1e7d74a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ef35b21da4cd8130642539d8245f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc217a57af5f5f52050c63e17cad118.png)
您最近一年使用:0次
9 . 已知数列
;数列
是等比数列,
成等差数列.
(1)求
、
通项公式;
(2)若
前n项和
满足
,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e11e39abe5d7cefc45234cfa27053b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623619e8e268f075268532378dd24175.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af110d007e2ad8ec987a948b8854f724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ad7687f6d9810d2d8e243bb919ae1ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc8c7b6a2c391b291e1445f309cad3f.png)
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2023-03-11更新
|
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6卷引用:吉林省“BEST合作体”2022-2023学年高二上学期期末考试数学试题
吉林省“BEST合作体”2022-2023学年高二上学期期末考试数学试题吉林省长春市实验中学2022-2023学年高二下学期期初考试数学试题浙江省“山水联盟”2020-2021学年高三上学期开学考试数学试题(已下线)解密09 数列前n项和及其应用(讲义)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(新高考专用) (已下线)专题6-2 数列求和15种类型归纳-2022年高考数学毕业班二轮热点题型归纳与变式演练(全国通用)江苏省南京市第一中学2022-2023学年高二下学期3月月考数学试题
10 . 在正项数列
中,
,
.
(1)求
;
(2)证明:
.
![](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/72fede0eb854f39a53fb01c4fc5060fa.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a571aa47a61706758aa2f16ba9f56f2.png)
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2023-04-13更新
|
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4卷引用:吉林省长春市2023届高三三模数学试题