名校
1 . 已知
是无穷数列,
,
且对于
中任意两项
,
在
中都存在一项
,使得
.
(1)若
,
求
;
(2)若
,求证:数列
中有无穷多项为
;
(3)若
,求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0361c11b97dbd249aaf084e8e8bb75fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d0ad085279d897f162504ca5618608a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a4f4b1af1618089ebf0d32026f40dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0616dca5cf0229b9f801365cc2bcfff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba50a82a53f0e597c096ccf5746f1b9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53abaaac2e62f510d996e6db22aefe7.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f273c5e859fd6256f887c979bb78d957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23725094c363fd158166a8698971694c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657435e1fda84118e7f63c97505c8b75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
您最近一年使用:0次
2020-11-15更新
|
549次组卷
|
4卷引用:北京市海淀区2021届高三上学期期中考数学试题
北京市海淀区2021届高三上学期期中考数学试题北京一零一中学2022届高三9月月考统练一数学试题北京市第二十中学2022-2023学年高二下学期期中考试试卷(已下线)2020年高考北京数学高考真题变式题16-21题
2 . 已知点的序列
,其中
.(
是线段
的中点,
是线段
的中点,……,
是线段
的中点,…)
(1)写出
与
之间的关系
;
(2)设
,计算
,由此推测数列
的通项公式,并且加以证明;
(3)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6efe8e23ba28b415fe26cd742e0fda1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e883f1d1fb1235fdcebbdddc10260f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a7d8ddf2222c69472646efc47ff424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473913c0887bb64d386f4c02f1853452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e47cd514b2920609e3781c87df6ab70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11603c89c66f064b263af841dae023f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a4f2bafc3346d14a8967ce2546157d.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217df7d069af637f4a9edefb9d2b10c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80be0c3c50d2bd6230b53fbd056122df.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c775fc62e7696028a9184e5212f0446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c14d9ae06f864498048d55088ff4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea5542cfe5ed49d02ad4c2e81de092a2.png)
您最近一年使用:0次
2020-06-26更新
|
345次组卷
|
3卷引用:2002年普通高等学校春季招生考试数学(理)试题(北京卷)
3 . 给定一个n项的实数列
,任意选取一个实数c,变换T(c)将数列a1,a2,…,an变换为数列|a1﹣c|,|a2﹣c|,…,|an﹣c|,再将得到的数列继续实施这样的变换,这样的变换可以连续进行多次,并且每次所选择的实数c可以不相同,第k(k∈N*)次变换记为Tk(ck),其中ck为第k次变换时选择的实数.如果通过k次变换后,数列中的各项均为0,则称T1(c1),T2(c2),…,Tk(ck)为“k次归零变换”.
(1)对数列:1,3,5,7,给出一个“k次归零变换”,其中k≤4;
(2)证明:对任意n项数列,都存在“n次归零变换”;
(3)对于数列1,22,33,…,nn,是否存在“n﹣1次归零变换”?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aaad499c61359539c24c3661032b437.png)
(1)对数列:1,3,5,7,给出一个“k次归零变换”,其中k≤4;
(2)证明:对任意n项数列,都存在“n次归零变换”;
(3)对于数列1,22,33,…,nn,是否存在“n﹣1次归零变换”?请说明理由.
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解题方法
4 . 等比数列
的前
项和为
,已如
,
,
.
(1)求
和
;
(2)证明:对任意
,
.
![](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/f9c752ebe8516e7d3327f3410473d9a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0863cf59114f905e9ad3debc5572792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c4867dfd2b1fa71e386275fe0fed234.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)证明:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9de3115d089c83767f48103d9cbf890e.png)
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真题
名校
5 . 已知数列
,从中选取第
项、第
项、…、第
项
,若
,则称新数列
为
的长度为
的递增子列.规定:数列
的任意一项都是
的长度为1的递增子列.
(Ⅰ)写出数列1,8,3,7,5,6,9的一个长度为4的递增子列;
(Ⅱ)已知数列
的长度为
的递增子列的末项的最小值为
,长度为
的递增子列的末项的最小值为
.若
,求证:
;
(Ⅲ)设无穷数列
的各项均为正整数,且任意两项均不相等.若
的长度为
的递增子列末项的最小值为
,且长度为
末项为
的递增子列恰有
个
,求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5f59bc23cf55f56312c9ed9806371f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6af9e7b1c23db5584ad8521d4444d5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/608d034715f9b1dfb306f9c89d383582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b50b790c283faa2e8d38c489b2e08a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f312c01c634db99e3be2e040681c1e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62aa8180718d9578d089bebd4b1acf60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅰ)写出数列1,8,3,7,5,6,9的一个长度为4的递增子列;
(Ⅱ)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a639de56413ec51b25f72be898f31cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8204e935be0688ce1561d9107b635480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4610754dff007c541aa4887d8705329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/477bb738134dc0d32a331ac5c634574b.png)
(Ⅲ)设无穷数列
![](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/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed47813750761cc4d776edc2fbe2240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed47813750761cc4d776edc2fbe2240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b762a12ba0a9890640d9e471e0597467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500063042d9f5375f664a8963f80a315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2019-06-09更新
|
5815次组卷
|
19卷引用:2019年北京市高考数学试卷(理科)
2019年北京市高考数学试卷(理科)(已下线)专题21 数列的综合应用-2020年高考数学母题题源解密(北京专版)(已下线)专题08 数列——2019年高考真题和模拟题理科数学分项汇编(已下线)专题12 数列——三年(2018-2020)高考真题理科数学分项汇编(已下线)专题14 数列综合-五年(2016-2020)高考数学(理)真题分项(已下线)考点20 数列的综合运用-2021年高考数学三年真题与两年模拟考点分类解读(新高考地区专用)人教A版(2019) 选择性必修第二册 过关斩将 第四章 数列 4.1-4.4综合拔高练(已下线)预测07 数列-【临门一脚】2020年高考数学三轮冲刺过关(江苏专用)北京市第四十四中学2023届高三上学期十二月月考数学试题北京市人大附中2022-2023学年高二数学期末复习参考试题(1)北京十年真题专题06数列(已下线)专题09 数列-五年(2017-2021)高考数学真题分项(新高考地区专用)苏教版(2019) 选修第一册 一蹴而就 第4章 单元整合(已下线)考向29 推理与证明-备战2022年高考数学一轮复习考点微专题(上海专用)(已下线)专题17 盘点数列与其它知识交汇问题——备战2022年高考数学二轮复习常考点专题突破上海市松江一中2022届高三下学期3月阶段测试数学试题沪教版(2020) 选修第一册 精准辅导 第4章 4.3(1)数列的概念与性质(已下线)专题17 数列探索型、存在型问题的解法 微点1 数列探索型问题的解法(已下线)专题21 数列解答题(理科)-2
6 . 对给定的d∈N*,记由数列构成的集合
.
(1)若数列{an}∈Ω(2),写出a3的所有可能取值;
(2)对于集合Ω(d),若d≥2.求证:存在整数k,使得对Ω(d)中的任意数列{an},整数k不是数列{an}中的项;
(3)已知数列{an},{bn}∈Ω(d),记{an},{bn}的前n项和分别为An,Bn.若|an+1|≤|bn+1|,求证:An≤Bn.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5e4d321958e5cb224bd9a75d28f8d5.png)
(1)若数列{an}∈Ω(2),写出a3的所有可能取值;
(2)对于集合Ω(d),若d≥2.求证:存在整数k,使得对Ω(d)中的任意数列{an},整数k不是数列{an}中的项;
(3)已知数列{an},{bn}∈Ω(d),记{an},{bn}的前n项和分别为An,Bn.若|an+1|≤|bn+1|,求证:An≤Bn.
您最近一年使用:0次
2019-01-29更新
|
331次组卷
|
2卷引用:【区级联考】北京市东城区2019届高三第一学期期末数学(理)试题
解题方法
7 . 若无穷数列
满足:
是正实数,当
时,
,则称
是“
-数列”.已知数列
是“
-数列”.
(1)若
,写出
的所有可能值;
(2)证明:
是等差数列当且仅当
单调递减;
(3)若存在正整数
,对任意正整数
,都有
,证明:
是数列
的最大项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba94ed3afe982edb7a0c0ab6afe329aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)若存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b34e4ee11d8f0fa8efc2260f3c6cd795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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解题方法
8 . 已知数列
满足
,且
.
(1)当
时,写出
的通项公式(直接写出答案,无需过程);
(2)求最小整数
,使得当
时,
是单调递增数列;
(3)是否存在
使得
是等比数列?若存在请求出;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/64b72bd2e6165bd25cd5a5d3ba53df2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f0e3cd5185c9e4db69ceece8346f5c2.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求最小整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49adcdf314415db3fdfe33d7a133b75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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9 . 对于
维向量
,若对任意
均有
或
,则称
为
维
向量. 对于两个
维
向量
定义
.
(1)若
, 求
的值;
(2)现有一个
维
向量序列:
若
且满足:
,求证:该序列中不存在
维
向量
.
(3) 现有一个
维
向量序列:
若
且满足:
,若存在正整数
使得
为
维
向量序列中的项,求出所有的
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d5161d0f48af5d683e6437e7263a19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475426b747f4fb1632ab89616983f44c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca64ef9e0c3dd14e99d113dbbe973ace.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4988a9309359e790f4750d640a615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c267471981116d4f1efafbdb5d8a307a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec5881e8018da8862a8d6ce6d8ad0961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3bcb4828b16c8e845492f1a53ddd9a9.png)
(2)现有一个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e81fd1ebe96bd830c057f5f9c2c871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069e0779f6f4c055d2b1ae8819856aea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164e87e68a2189679fd71b910611abf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deea0d65e8bba231c24029c419d8623e.png)
(3) 现有一个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e81fd1ebe96bd830c057f5f9c2c871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fea0a314158f7ddb302b29c03a7b4446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4fb7a0db2d0ed0c3b60c989ec52da1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae4d9051450515a74d33bbb0aa92be19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2017-05-04更新
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607次组卷
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5卷引用:北京市东城区2017届高三二模理科数学试题
北京市东城区2017届高三二模理科数学试题北京市东城区2017届高三5月综合练习(二模)数学理试题北京市东城区2017届高三5月综合练习(二模)理数试题(已下线)卷02-【赢在高考·黄金20卷】备战2021年高考数学全真模拟卷(北京专用)(已下线)北京市第四中学2023~2024学年高二上学期期中考试数学试题