名校
1 . 设数列
满足
,其中
,且
,
为常数.
(1)若
是等差数列,且公差
,求
的值;
(2)若
,且存在
,使得
对任意的
都成立,求
的最小值;
(3)若
,且数列
不是常数列,如果存在正整数
,使得
对任意的
均成立. 求所有满足条件的数列
中
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4c63e894402368c2d3ccc41fb53205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bc5735838e43b7a229e8f45c9bfffb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac69e6db1df13ed64756b4f391ae9fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc23f793ac06643cfc07e01eb205aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d7448e65bda478cce0c6092e2c9eff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1a89ad1646a6d4fcdcf1bc84414201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78fbecca12ee62538020483fd55a2109.png)
![](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/6b2b94cbf8f1acc77ed2618d9ba5756a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
您最近一年使用:0次
2018-01-18更新
|
715次组卷
|
7卷引用:南京市、盐城市2018届高三年级第一次模拟考试数学(理)试题
南京市、盐城市2018届高三年级第一次模拟考试数学(理)试题(已下线)2018年高考二轮复习测试专项【苏教版】专题六 不等式(已下线)《2018届优等生百日闯关系列》【江苏版】专题二 第五关 以子数列或生成数列为背景的解答题上海市格致中学2018-2019学年高三下学期3月月考数学试题2020届江苏省南通市如东县栟茶高级中学高三上学期第三次月考数学试题上海市七宝中学2022届高三冲刺模拟卷二数学试题江苏省南京市六校2024届高三下学期期初联合调研数学试题
2 . 已知数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/674f0a8b77879e3644e6f40b139e0d27.png)
为正常数.
(1)求证:对于一切
恒成立;
(2)若数列
为等差数列,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/674f0a8b77879e3644e6f40b139e0d27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(1)求证:对于一切
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf444c2cbfc0df2cc23fbab8d7654b8.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
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3 . 已知两个无穷数列
和
的前
项和分别为
,
,
,
,对任意的
,都有
.
(1)求数列
的通项公式;
(2)若
为等差数列,对任意的
,都有
.证明:
;
(3)若
为等比数列,
,
,求满足
的
值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb26cd1601fe7e76e1e2dc0b4909324a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381576e698a46df8c497e6b5f8346ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/590d6a26e0dabbd16abb6ec968466af7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8c29b297e3ec337c3139c2a1ebed1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e7bec94f0d60f6d65c40c8a01e70b0d.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8c29b297e3ec337c3139c2a1ebed1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773aef47607d9a5fdeb5174c0e94c77d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b8896da0a5886c37fbd55d52e81ea61.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a00682d1dd7f5ed5b11b7fce8677f475.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d31e7a79ba4690f53eae9f9fc7d2be39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c304686d2c8a286fc1d6371a2a2f66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e77a4c414c33b70416c98375aade8f7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
名校
4 . 对于任意
,若数列
满足
,则称这个数列为“K数列”.
(1)已知数列:1,
,
是“K数列”,求实数m的取值范围;
(2)是否存在首项为-1的无穷等差数列
为“K数列”,且其前n项和
满足:
,若存在,求出
的通项公式;若不存在,请说明理由;
(3)已知各项均为正整数的等比数列
(至少有4项)为“K数列”,数列
不是“K数列”,若
,是否存在
,使
为“K数列”?若存在,请求出,
若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdb5679fa7c34fc2235d2a54d189cfbb.png)
(1)已知数列:1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0623207595425920f16e76a7f8f268b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d7b4bb12628d5ed455d814b8aafa1f.png)
(2)是否存在首项为-1的无穷等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5011f62c285c73e9baddd16f485777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11ccfdc706f6b34fca9fe0b6861f98f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5011f62c285c73e9baddd16f485777.png)
(3)已知各项均为正整数的等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5011f62c285c73e9baddd16f485777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed6e14fb838e9ebfcfc65c8c45c5268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dec647aa5a790540546327105909ff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5011f62c285c73e9baddd16f485777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5011f62c285c73e9baddd16f485777.png)
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2010·上海·二模
名校
5 . 本题共有3个小题,第1小题满分4分,第2小题满分6分,第3小题满分8分.
从数列
中取出部分项,并将它们按原来的顺序组成一个数列,称之为数列
的一个子数列.
设数列
是一个首项为
、公差为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
的无穷等差数列.
(1)若
,
,
成等比数列,求其公比
.
(2)若
,从数列
中取出第2项、第6项作为一个等比数列的第1项、第2项,试问该数列是否为
的无穷等比子数列,请说明理由.
(3)若
,从数列
中取出第1项、第![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
项(设
)作为一个等比数列的第1项、第2项,试问当且仅当
为何值时,该数列为
的无穷等比子数列,请说明理由.
从数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b60fc6993ed58c125ae54ec70c48c718.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfeed3915a3ecf2d0ae0779745fee624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1bfe8959ea2129b3c3193a147cad712.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2159c002e87e5d2190bd4d55b76549d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
您最近一年使用:0次
名校
解题方法
6 . 已知λ,μ为常数,且为正整数,λ≠1,无穷数列{an}的各项均为正整数,其前n项和为Sn,对任意的正整数n,Sn=λan﹣μ.记数列{an}中任意两不同项的和构成的集合为A.
(1)证明:无穷数列{an}为等比数列,并求λ的值;
(2)若2015∈A,求μ的值;
(3)对任意的n∈N*,记集合Bn={x|3μ•2n﹣1<x<3μ•2n,x∈A}中元素的个数为bn,求数列{bn}的通项公式.
(1)证明:无穷数列{an}为等比数列,并求λ的值;
(2)若2015∈A,求μ的值;
(3)对任意的n∈N*,记集合Bn={x|3μ•2n﹣1<x<3μ•2n,x∈A}中元素的个数为bn,求数列{bn}的通项公式.
您最近一年使用:0次
2016-12-04更新
|
638次组卷
|
2卷引用:2016届上海市建平中学高三上12月月考理科数学试卷
名校
7 . 已知数列
满足:
(其中
且
),
为数列
的前
项和.
(1)若
,求
的值;
(2)求数列
的通项公式
;
(3)当
时,数列
中是否存在三项构成等差数列,若存在,请求出此三项;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/84e4a6ba8df6cbe80b09da11a40df0bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78fbecca12ee62538020483fd55a2109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9805d9c45198c7a249f317222f564999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2251391555522aa9598f3c6587c011f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1c3ea872a20fdc1843cb5ffce8a554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次