1 . 已知数列
为等差数列,
,
的前
和为
,数列
为等
比数列,且
对任意的
恒成立.
(Ⅰ)求数列
、
的通项公式;
(Ⅱ)是否存在非零整数
,使不等式
对一切
都成立?若存在,求出
的值;若不存在,说明理由.
(Ⅲ)各项均为正整数的无穷等差数列
,满足
,且存在正整数k,使
成等比数列,若数列
的公差为d,求d的所有可能取值之和.
![](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/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/034ba25825c13725931c483aa47c9363.png)
比数列,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca8a0c2499f7a5e1860d23940cd87b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(Ⅱ)是否存在非零整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0bc042352e2f4d4a5cc80492ad120d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(Ⅲ)各项均为正整数的无穷等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc25e825ee0cd0b1708aa39349468716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78bf40d71329e4898bd227324173cc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
您最近一年使用:0次
2 . (注意:在试题卷上作答无效)
已知数列
中,
.
(Ⅰ)设
,求数列
的通项公式;
(Ⅱ)求使不等式
成立的
的取值范围.
已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb0a30bfe0b5c36ca9ef87ee12eaa82.png)
(Ⅰ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a596fab7cf61a25591dd4d81dbc617.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
(Ⅱ)求使不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dce6905169349f3369e45914dfdf5ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
2016-11-30更新
|
701次组卷
|
7卷引用:第三篇 数列、排列与组合 专题5 迭代数列与极限 微点2 迭代数列收敛性及其应用(一)
(已下线)第三篇 数列、排列与组合 专题5 迭代数列与极限 微点2 迭代数列收敛性及其应用(一)(已下线)第三篇 数列、排列与组合 专题4 数列的不动点 微点2 数列的不动点(二)(已下线)第三篇 数列、排列与组合 专题4 数列的不动点 微点1 数列的不动点(一)(已下线)专题10 数列通项公式的求法 微点6 倒数变换法2010年普通高等学校招生全国统一考试(全国Ⅰ)理科数学全解全析2015届重庆市巴蜀中学高三上学期第三次月考理科数学试卷上海市七宝中学2016-2017学年高二上学期开学考试数学试题
3 . 已知无穷数列
的各项都是正数,其前
项和为
,且满足:
,
,其中
,常数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
.
(1)求证:
是一个定值;
(2)若数列
是一个周期数列(存在正整数
,使得对任意
,都有
成立,则称
为周期数列,
为它的一个周期),求该数列的最小周期;
(3)若数列
是各项均为有理数的等差数列,
(
),问:数列
中的所有项是否都是数列
中的项?若是,请说明理由;若不是,请举出反例.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/e7fab51121848ce166035ceab6f4e00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2ad613ce3380f983f09c8690e7df4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe80aeedc8536a87704740c14c73acb.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87e872b54bef7a4843c26c1f734fa7f.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2b94cbf8f1acc77ed2618d9ba5756a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c77a0d9091238b8d5eab4e4a8129149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
您最近一年使用:0次
2020-01-07更新
|
353次组卷
|
3卷引用:专题17 数列探索型、存在型问题的解法 微点2 数列存在型问题的解法
名校
解题方法
4 . 已知数列
为等比数列,
公比为q,且
,
为数列
的前
项和.
(1)若
求
;
(2)若调换
的顺序后能构成一个等差数列,求
的所有可能值;
(3)是否存在正常数
,使得对任意正整数
,不等式
总成立?若存在,求出
的范围,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/b14f5fdf0e4f9de36f08402dd96d237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45482d31d1d7448c9f3922b4d2a55331.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/09e3ab8dd752f8680d384270f470549b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a358586310926c6ac0a65a9076d1ecc.png)
(2)若调换
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c14d9ae06f864498048d55088ff4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(3)是否存在正常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b086f58f1aca9eae6626d4df844114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78758feae95093c48b363927d94a67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
您最近一年使用:0次
2017-12-26更新
|
682次组卷
|
6卷引用:专题17 数列(模拟练)
(已下线)专题17 数列(模拟练)(已下线)2018年高考二轮复习测试专项【苏教版】专题五 数列(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江苏省启东中学2018届高三上学期第二次月考数学试题江西省宜春市樟树中学2017-2018学年高一下学期第三次月考数学(理)试题上海市交大附中2019届高三高考一模试卷数学试题
5 . 数列
中,已知
对任意
都成立,数列
的前
项和为
.(这里
均为实数)
(1)若
是等差数列,求
的值;
(2)若
,求
;
(3)是否存在实数
,使数列
是公比不为
的等比数列,且任意相邻三项
按某顺序排列后成等差数列?若存在,求出所有
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7acff98078cdd32804d8f1c4efbe2ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/d69991030d802192aff4af523d5bcf7e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed160984f6a266078c412e00cee150dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7a2ef115b3e4d764e54e8b29e33b036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
6 . 设
,
为正整数,一个正整数数列
,
,…,
满足
,对
,定义集合
,数列
,
,…,
中的
(
)是集合
中元素的个数.
(I)若数列
,
,…,
为5,3,3,2,1,1,写出数列
,
,…,
;
(II)若
,
,
,
,…,
为公比为
的等比数列,求
;
(III)对
,定义集合
,令
是集合
中元素的个数.求证:对
,均有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](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/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c827decbf8ca42797b3ab43562d8a834.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59d39259c5b099998c3641814be99a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4479e73de0664383ce113b4f01ae4598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f64696f60c533ad95dc7890eb902741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1602c6064af12eed3fd1291f8272d93c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59d39259c5b099998c3641814be99a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdc5c895153932c3e827a464664cef90.png)
(I)若数列
![](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/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f64696f60c533ad95dc7890eb902741.png)
(II)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334f8809e0f6e2a995f034b86f6c5501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527093b2ec760913d0dccff8a099248b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f64696f60c533ad95dc7890eb902741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831ed34d8c6d99fdd0b94688ef03bfcb.png)
(III)对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2429b6a233ef2f66677b15bc11a13294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c608fc4965bcc95b7f9d463aa9499b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12161550d951e17f4eb3de58496cd6e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e19dd2f5dd5c782fc17b44ad2d68a450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2429b6a233ef2f66677b15bc11a13294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b554bc1451068f8a8d7f2432ef545ff.png)
您最近一年使用:0次
名校
7 . 设
个正数
依次围成一个圆圈,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4535ff56ef8474bad52c926606559d.png)
是公差为
的等差数列,而
是公比为
的等比数列.
(1)若
,求数列
的所有项的和
;
(2)若
,求
的最大值;
(3)当
时是否存在正整数
,满足
?若存在,求出
值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db483ae293e2b969b92eca4524f063fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4535ff56ef8474bad52c926606559d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6efb87a8bd689f9b64e77a1f43baebc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95f1ac6ae6c0b67c9759c41f7791117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9591790acda6cfada02926e2f0c7f3e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20655342f9ace8b50a50f5eae6f37beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1752474698cd5466dd180df0a00ba9c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e62e90b62ea982a32315cc2c2d2ccae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d9b6c86435e0ceff94d8ad1cd03737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea69afba9cf603bb1625578e356dfbff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2019-12-05更新
|
222次组卷
|
3卷引用:模块一 专题5《等差数列与等比数列》单元检测篇 A基础卷 期末终极研习室(高二人教A版)
名校
8 . 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)
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