1 . 已知数列
满足以下两个条件:①
,当
时,
;②若存在某一项
,则存在
,2,
,
,使得
且
.
(1)若
,求
,
,
;
(2)若对一切正整数
,
均成立的
的最小值为6,求该数列的前9项之和;
(3)在所有的数列
中,求满足
的
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab93bd7bd165b611cb703028a5d5193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5d534617450637a80cac817fec5b7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbd52b58e29eb6615040a53389ab94c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685dacc5d2f23fb24fdb631abce337c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de915e6bc27aa83532311b9e235e8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e5fc8819089fe84aefe128b6c6f90f3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b967232e28ad0d453adc66676bdf8b2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
(2)若对一切正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2b94cbf8f1acc77ed2618d9ba5756a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(3)在所有的数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8cd9b2d7084a9db3df313891d64d9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2022-11-07更新
|
247次组卷
|
3卷引用:上海市黄浦区2022届高考二模数学试题
解题方法
2 . 已知
为实数,数列
满足:①
;②
.若存在一个非零常数
,对任意
,
都成立,则称数列
为周期数列.
(1)当
时,求
的值;
(2)求证:存在正整数
,使得
;
(3)设
是数列
的前
项和,是否存在实数
满足:①数列
为周期数列;②存在正奇数
,使得
.若存在,求出所有
的可能值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fab51121848ce166035ceab6f4e00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cdd8a3e3a27ae058085810cb6994142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb047a8096a11578133a9bd20b734fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2b94cbf8f1acc77ed2618d9ba5756a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3eead98a7980470f3345ccaa8384b9b.png)
(2)求证:存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c3a1aba8da22a13efe1d08c9de1449.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe3b025e582fd16562ca1da1fa69299b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
3 . 已知无穷数列
的前
项和为
,
,
,对任意的
,都有
.
(1)求数列
的通项公式;
(2)若数列
满足
,
,求数列
的通项公式;
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315b41eeea0dbaa395af2474c4ba6acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09380c5ccac2f39720cfd81d4cfff4cb.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/435ee72465a24a84eb5b18bd0cb1c171.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e1ee88beaddafb0d0a185c3a8e0dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
您最近一年使用:0次
名校
解题方法
4 . 已知数列
的前
项和
,数列
满足
,
.
(1)求数列
、
的通项公式.
(2)若
,求数列
的前
项和
.
![](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/ddaf0e392a29269522a8fde7fa8a87cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcba622ae8d5e614f5f59982ce9b9b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ce8f630feb83122acb70e54496f786.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b57fc61aae0064542bbb65f1df944a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2022-10-16更新
|
1036次组卷
|
5卷引用:上海交通大学附属中学2023届高三上学期10月月考数学试题
名校
解题方法
5 . 数列
的前
项和
,
(1)若
为等差数列,求公差、首项、
的值;
(2)在(1)的条件下,求数列
的前
项和
.
![](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/0d13868807c9febabca9a65e8c30208b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)在(1)的条件下,求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95ae7d2dda9e85d17f9f3e370f2850b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87bd7d18f67e90a7c37fad4252e43c9d.png)
您最近一年使用:0次
2022-09-28更新
|
542次组卷
|
3卷引用:上海市嘉定区2023届高三上学期9月统考数学试题
名校
解题方法
6 . 已知数列
为数列
的前n项和,且
.
(1)求数列
的通项公式;
(2)求证:
;
(3)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa2400f7c3789ea51e238dc193167102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a370de02d7c4e5e7bf601eba5de016b4.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946cca301525e6dcb842ea04dde3b1db.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5950369eb310c285e656600a5d8215.png)
您最近一年使用:0次
2022-09-23更新
|
2384次组卷
|
9卷引用:上海市南洋模范中学2023届高三下学期3月模拟1数学试题
名校
解题方法
7 . 已知数列
的前n项和为
,数列
满足
,
.
(1)证明
是等差数列;
(2)是否存在常数a、b,使得对一切正整数n都有
成立.若存在,求出a、b的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa56a61a142de0fa44bce58ab07a3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/499b4ab23284486683f152df5bc295fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1bef6ef8aa7c0932585b18e205d8147.png)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)是否存在常数a、b,使得对一切正整数n都有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa9683815c31e9d569c2848ba3e7c9b1.png)
您最近一年使用:0次
2022-09-13更新
|
1902次组卷
|
10卷引用:上海市格致中学2023届高三上学期开学考试数学试题
上海市格致中学2023届高三上学期开学考试数学试题上海市交通大学附属中学2024届高三上学期开学考数学试题吉林省“BEST合作体”2022-2023学年高二上学期期末考试数学试题吉林省长春市实验中学2022-2023学年高二下学期期初考试数学试题江苏省盐城市伍佑中学2022-2023学年高二上学期12月月考数学试题广东省佛山市顺德区华侨中学2024届高三港澳班上学期期中数学试题(已下线)模块三 专题7 大题分类练(数列)拔高能力练 期末终极研习室(高二人教A版)(已下线)考点7 等差、等比数列的联姻 2024届高考数学考点总动员(已下线)第05讲:等差数列和等比数列(必刷12大考题+12大题型)-2023-2024学年高二数学上学期《考点·题型·难点》期末高效复习(人教A版2019)(已下线)专题06 数列在高考中的考法(难点,十一大题型+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)
解题方法
8 . 设
为数列
的前
项和,满足
.
(1)求
,
,
,
的值,并由此猜想数列
的通项公式
;
(2)用数学归纳法证明(1)中的猜想.
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b1b902c6e1d7f782dcc317939d863a2.png)
(1)求
![](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/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)用数学归纳法证明(1)中的猜想.
您最近一年使用:0次
2023-01-10更新
|
258次组卷
|
3卷引用:上海市嘉定区第二中学2022-2023学年高二下学期期中数学试题
上海市嘉定区第二中学2022-2023学年高二下学期期中数学试题(已下线)专题04数列全章复习攻略--高二期末考点大串讲(沪教版2020选修)天津市蓟州区上仓中学2020-2021学年高二下学期期末数学试题
解题方法
9 . 已知数列
的前
项和
满足:
,(
).
(1)求数列
的通项公式;
(2)令
,数列
的前
项和为
,求证:
.
![](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/c3ddd6d99ad32dd7fdb1797d8cf94786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9eb8044af0d676d3bac6d75bbb03aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.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/ede8888e1a1782c2d75c8298567761a5.png)
您最近一年使用:0次
名校
解题方法
10 . 对于数列
,若从第二项起,每一项与它的前一项之差都大于或等于(小于或等于)同一个常数d,则
叫做类等差数列,
叫做类等差数列的首项,d叫做类等差数列的类公差.
(1)若类等差数列
满足
,请类比等差数列的通项公式,写出数列
的通项不等式(不必证明);
(2)若数列
中,
,
.
①判断数列
是否为类等差数列,若是,请证明,若不是,请说明理由;
②记数列
的前n项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936359df4c926b72b48c6fdae55f12d.png)
(1)若类等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8b1261de54b824c12b6887053416c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14835bf3f00139ccec0694d0924db795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0566ce71a91f5939b92eb8d59e8ec5.png)
①判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
②记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c806dc9bf2cad0cb20220d23bd252a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29858a858c8ec1e1c65db718400a4a95.png)
您最近一年使用:0次
2022-07-17更新
|
774次组卷
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6卷引用:上海市七宝中学2023届高三下学期开学考试数学试题
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