1 . 在数学和许多分支中都能见到很多以瑞士数学家欧拉命名的常数、公式和定理,如:欧拉函数
(
)的函数值等于所有不超过正整数n且与n互素的正整数的个数,(互素是指两个整数的公约数只有1),例如:
;
(与3互素有1、2);
(与9互素有1、2、4、5、7、8).记
为数列
的前n项和,则
=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d40cb0f4dfbccdd4b6dadb06588fc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9edd29e22f6a7f4d14d9f8d2684d47e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea1d22420e844884025655b0893066e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7b9b161fc14121365cdf150e3f7784.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f40c6767696b6b00d9d19f9a569332f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3cf6f2bbe20a404fea41a4d2b1c4c7.png)
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您最近一年使用:0次
2022-05-08更新
|
2275次组卷
|
8卷引用:专题4 欧拉
(已下线)专题4 欧拉(已下线)重难点07五种数列求和方法-2(已下线)专题17 数列综合应用-3安徽省合肥市肥东县综合高中2021-2022学年高二下学期期中考试数学(理)试题湖南省长沙市湖南师范大学附属中学2023-2024学年高二下学期入学考试数学试题湖南省长沙市部分学校2023-2024学年高二下学期入学暨寒假作业检测联考数学试卷广西壮族自治区百色市德保县德保高中2023-2024学年高二下学期3月月考数学试题广东省2022届高三三模数学试题
名校
解题方法
2 . 设数列
的前
项和为
,若
,则称
是“紧密数列”.
(1)若
,判断
是否是“紧密数列”,并说明理由;
(2)若数列
前
项和为
,判断
是否是“紧密数列”,并说明理由;
(3)设数列
是公比为
的等比数列.若数列
与
都是“紧密数列”,求
的取值范围.
![](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/ed89c4ef3df0eac424c16e5219ad2059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65da1a4e18115fb39fd6d7b88c8ed6e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](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/3d10c289b0d44d448d3706682dbc7ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
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2023-06-07更新
|
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|
7卷引用:专题08 数列
(已下线)专题08 数列(已下线)专题01 数列大题(已下线)模型1 用综合法快解新情境背景下的数列创新题模型(高中数学模型大归纳)(已下线)大招1 创新数列交汇问题的速破策略北京市东城区第一六六中学2024届高三上学期期末模拟测试数学试题(已下线)北京市东城区第一六六中学2023-2024学年高三上学期期末模拟考试数学试题广东省汕头市金山中学2023屇高三三模数学试题
2024·全国·模拟预测
名校
解题方法
3 . 若数列
,对于![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575b595263649b6199af0be1643b9f3f.png)
,都有
(
为常数)成立,则称数列
具有性质
.已知数列
的通项公式为
,且具有性质
,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575b595263649b6199af0be1643b9f3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deda945164283569437cda6976fe35ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8948a2bcde0e4fc64f337c76eb8b61be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa8264eb8eea3025a152318df8720b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a7ccaa2b3506073eec94f3e3363872.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c414a10d73f453fc1109e5b2243d2369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
4 . 意大利数学家傲波那契在研究兔子繁殖问题时发现了数列1,1,2,3,5,8,13,…,数列中的每一项被称为斐波那契数,记作Fn.已知
,
,
(
,且n>2).
(1)若斐波那契数Fn除以4所得的余数按原顺序构成数列
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef965c11e5a2b3ea39e8878565274c5.png)
___________ .
(2)若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ce8c715be855183f0a58ced942e133.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db966a50d8f7548c0107958742e238a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/613415f9dd1c557595459f2f2399584f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d37baa6b44a7fe407c89ca7e29af4809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
(1)若斐波那契数Fn除以4所得的余数按原顺序构成数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef965c11e5a2b3ea39e8878565274c5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da70ad98fa365c1d25e9c9e1a0f02164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ce8c715be855183f0a58ced942e133.png)
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2023-02-19更新
|
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|
5卷引用:押新高考第16题 数列性质及其应用
5 . 已知各项均不为0的递增数列
的前
项和为
,且
(
,且
).
(1)求数列
的前
项和
;
(2)定义首项为2且公比大于1的等比数列为“
-数列”.证明:
①对任意
且
,存在“
-数列”
,使得
成立;
②当
且
时,不存在“
-数列”
,使得
对任意正整数
成立.
![](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/2810eaf7cba4fb3420b7124c2702b26c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8050391385b496e9c059201e4f12600a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(2)定义首项为2且公比大于1的等比数列为“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
①对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb931a4b3eaa34e2c6f7dab5650f8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad52924df9291d5d191d18e09374ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95702d51d453347207cf73c6d5472717.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1eae62173655a75678b9514af29d56f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7399fcd570d1de4057f2059759d18cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb534fa10cb56e77d73ecbfe64f555f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb6c2bc0ec36972b7f0a8d09552e8b.png)
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6 . 设等比数列
的前
项和为
,前
项积为
,若满足
,
,
,则下列选项正确的是( )
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1381f0937c6052ce088e0eaee7df4880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dab98090b8c90ce2769691c0f10587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/017f1af7aea68e65fc27a326c08830d2.png)
A.![]() | B.![]() |
C.当![]() ![]() | D.当![]() ![]() |
您最近一年使用:0次
2023-08-11更新
|
1074次组卷
|
3卷引用:专题10 数列小题
7 . 对于每项均是正整数的数列
、
、
、
,定义变换
,
将数列
变换成数列
、
、
、
、
.对于每项均是非负整数的数列
、
、
、
,定义变换
,
将数列
各项从大到小排列,然后去掉所有为零的项,得到数列
;又定义
.设
是每项均为正整数的有穷数列,令
.
(1)如果数列
为
、
、
,写出数列
、
;
(2)对于每项均是正整数的有穷数列
,证明
;
(3)证明:对于任意给定的每项均为正整数的有穷数列
,存在正整数
,当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb6959af15155ee039bcb9fa0eeddee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9a724b59c890095baa5cb73e267c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9a724b59c890095baa5cb73e267c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5a95ce7fd8358c26962a9e8d524d687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/978e2f7118d2bd305086ae03cc7dd683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614206299653e4111ac285f5375e34c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07812c89c11b5cb96c2eb573e681cbd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f17923637012a75a01f309379c1909c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f64696f60c533ad95dc7890eb902741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9275bd8ce17fcc4a786510b008414ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9275bd8ce17fcc4a786510b008414ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f610650fae8e1f446b736e608061a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f1365b5e1c0926d9e303e33586ee520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/405b31b30a80182dba0527eb436264ee.png)
(1)如果数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
(2)对于每项均是正整数的有穷数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc4a4656523b5985571edfdd09340639.png)
(3)证明:对于任意给定的每项均为正整数的有穷数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b6ba2966874d33da6b94662d7cb23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291de980856351b0dd6582f33ab4d288.png)
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2023-03-09更新
|
1085次组卷
|
5卷引用:专题12压轴题汇总(10、15、21题)
专题12压轴题汇总(10、15、21题)(已下线)2023年北京高考数学真题变式题16-21(已下线)专题05 数列在高中数学其他模块的应用(九大题型+过关检测专训)-2023-2024学年高二数学《重难点题型·高分突破》(人教A版2019选择性必修第二册)北京市平谷区2023届高三一模数学试题北京市陈经纶中学团结湖分校2023届高三零模数学试题
名校
解题方法
8 . 若数列
满足
,其中
,则称数列
为M数列.
(1)已知数列
为M数列,当
时.
(ⅰ)求证:数列
是等差数列,并写出数列
的通项公式;
(ⅱ)
,求
.
(2)若
是M数列
,且
,证明:存在正整数n.使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a07614926587f57bc5f341c4f97f4d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec574b71bbd7671223f8c833c8c8b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec1a744042c32d0a851f98fafaa81f3.png)
(ⅰ)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/362832fa3d3c13c1eafd565349d66dce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115da54f93de5e89d1e7f443fccb61f8.png)
(ⅱ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0992722f5002aeafa39d25c6b5f4644b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21085fbd6c4b34588f17fc466c845ffe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a789a9be1723bfbd38ae538a9f39dc1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/446e8a7985d4d3dd95c70dc4aad67861.png)
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2024-03-25更新
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1228次组卷
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3卷引用:压轴题05数列压轴题15题型汇总-1
9 . 对于数列
,把它连续两项
与
的差记为
得到一个新数列
,称数列
为原数列
的一阶差数列.若
,则数列
是
的二阶差数列,以此类推,可得数列
的p阶差数列.如果某数列的p阶差数列是一个非零的常数列,则称此数列为p阶等差数列,如数列1,3,6,10.它的前后两项之差组成新数列2,3,4.新数列2,3,4的前后两项之差再组成新数列1,1,1,新数列1,1,1为非零常数列,则数列1,3,6,10称为二阶等差数列.已知数列
满足
,且
,则下列结论中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5653b60d16ec4e653518f0562680250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/703cdc7668aa4dcab77e448249f9446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baa3cf926c8a216a9bffc0b1b6f7add.png)
A.数列![]() |
B.数列![]() |
C.数列![]() ![]() |
D.若数列![]() ![]() ![]() ![]() |
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2023-04-12更新
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1065次组卷
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4卷引用:专题10 数列通项公式的求法 微点3 累乘法
(已下线)专题10 数列通项公式的求法 微点3 累乘法(已下线)专题11 数列前n项和的求法 微点3 裂项相消法求和(一)湖北省鄂东南省级示范教学改革联盟学校2022-2023学年高二下学期期中联考数学试题吉林省白山市抚松县第一中学2022-2023学年高三第十一次校内模拟数学试题
10 . 已知数列
满足
,
,设
的前
项积为
,且
.
(1)求数列
的通项公式;
(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/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.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/97e1445cde819818505e563773eb3ffc.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c0e0f79f503685fd53eb521763100e.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/97d8e1c2e3bee6260690e3dcf74403ee.png)
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