无穷数列
,若存在正整数
,使得该数列由
个互不相同的实数组成,且对于任意的正整数
,
中至少有一个等于
,则称数列
具有性质
,集合![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc111429c53c669e45b3a37869b001eb.png)
(1)若
,
,判断数列
是否具有性质
;
(2)数列
具有性质
,且
,
,
,
,求
、
的值;
(3)数列
具有性质
,记集合
,将集合
中的所有元素按从小到大的顺序排列,得到数列
,记
,
,证明:若数列
具有性质
,则数列
是常数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/393cafa7e27934b2ed05d65af451f2fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac190818c57f1504d04d86fea0c0204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/393cafa7e27934b2ed05d65af451f2fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc111429c53c669e45b3a37869b001eb.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec7510dc49bea69b5961573297f1289.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1505d56f0b35fe7f2de1fe1888036e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0abedd59476f8793d5a8948590a70c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171a37e4d0bf1ef80a57e8349e8e3a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdd9b5625cb5f752cd3481247a71b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e84c30444f13d37ada78285dc4f83b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be9c9b05fd84ac9256d49a5a553af5.png)
(3)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba62e5fc2a642f544a9eff5272f203d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11be0364247bc8af1552270971322971.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3315e9c6c2d3d60fb82ee0fa328fcbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1505d56f0b35fe7f2de1fe1888036e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
21-22高三下·上海杨浦·阶段练习 查看更多[4]
上海市控江中学2022届高三下学期3月月考数学试题(已下线)4.1 数列-2022-2023学年高二数学《基础·重点·难点 》全面题型高分突破(苏教版2019选择性必修第一册)(已下线)专题9 周期数列 微点1 周期数列的定义、性质和判定方法(已下线)4.3 数列-求数列通项的八种方法(八大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
更新时间:2022-03-21 22:07:32
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相似题推荐
【推荐1】已知点
,
,…,
,…(
为正整数)顺次为一条直线
上的点,点
,
,…,
,…(
为正整数)顺次为
轴上的点,其中
,对任意正整数
,点
,
,
构成以
为顶点的等腰三角形.
(1)求点
的坐标;
(2)求点
的横坐标
;
(3)上述等腰三角形
中,是否可能存在直角三角形?若可能,求此时
的值;若不可能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b87b004141936019163bce7750f4d64b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4f48eb78011c1fe80d72b0aaebc3a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b584d928d4282fb41e29287efe0973.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45bed26ea4bd954a67d90e0f41bb7739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99c698fa1b592c8b06af5dd5b58bf03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea335dc3d3316a56009e984c23a2693b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddac4e9e544b34d0c6548efb859ffb70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039af66355ed85ff4c204931b882b694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
(3)上述等腰三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f81cf4547a27425449c2141bd0d187a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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(0.4)
【推荐2】设数列
的前
项和为
,且方程
有一根为
.
(Ⅰ)求
;(Ⅱ)猜想数列
的通项公式,并给出严格的证明.
![](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/93373ab8aec577d9ef9f0ea3069c39ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a1827f431ba8e566e0e2e44b58fcba.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0158862238e250d2a2598b7d4ecd148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
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(0.4)
名校
【推荐1】设各项均为整数的无穷数列
满足
,且对所有
,
均成立.
(1)求
的所有可能值;
(2)若数列
使得无穷数列
是公差为1的等差数列,求数列
的通项公式;
(3)求证:存在满足条件的数列
,使得在该数列中有无穷多项为2021.
![](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/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c52c908859e988302ac7f411a46452.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e8ab57234dfc54a5315381c59c94f6.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a887443186bd90141bb7116e8ed38b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)求证:存在满足条件的数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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名校
【推荐2】设数列
中,若
,则称数列
为“凸数列”.
(Ⅰ)设数列
为“凸数列”,若
,试写出该数列的前6项,并求出该6项之和;
(Ⅱ)在“凸数列”
中,求证:
;
(Ⅲ)设
,若数列
为“凸数列”,求数列前n项和
.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b4f58999ef08df26776c235621331d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅰ)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5915f34b88367dc0f4c89ce8aec606d.png)
(Ⅱ)在“凸数列”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b60c9e5d32500a8d87b1995e79e391f.png)
(Ⅲ)设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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解题方法
【推荐1】若一个数列的奇数项为公差为正的等差数列,偶数项为公比为正的等比数列,且公差公比相同,则称数列为“摇摆数列”,其表示为
,
,
,若数列
为“摇摆数列”且
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cb519a2ad653cbd8e565687a7c0a86.png)
(1)求
的通项公式;
(2)若
,求数列
的前
项和
.(注:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a43121706692bcbc51e3d2a177b5839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d0919893474b813ff79a073cd69cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b17db8c17aecaa3991045048a758513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b037d2c4d975cb847c72b83e717860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cb519a2ad653cbd8e565687a7c0a86.png)
(1)求
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(2)若
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【推荐2】已知
是由非负整数组成的无穷数列,该数列前n项的最大值记为
,第n项之后各项
,
…的最小值记为
,
.
(1)若
为2,1,4,3,2,1,4,3…,是一个周期为4的数列(即对任意n∈N*,
),写出
的值;
(2)设d为非负整数,证明:
(n=1,2,3…)的充分必要条件为
为公差为d的等差数列;
(3)证明:若
,
(n=1,2,3…),则
的项只能是1或2,且有无穷多项为1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39222f0687c9124bddb35544bcc7798.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8c4312e4b482794178f8b34e61a1302.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a662a381e0867ce9d871c7a8e71f0d37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07ed9fa2d3ae8c7d15b7da794aff4c62.png)
(2)设d为非负整数,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/318108e4221f00c6d3256751df684a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)证明:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f99489791db717b082bd96abb88c55e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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