名校
解题方法
1 . 已知
为等差数列
的前n项和,
为其公差,且
,给出以下命题:
①
;②
;③使得
取得最大值时的n为8;④满足
成立的最大n值为17
其中正确命题的序号为___________ .
![](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/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b2c87f9f5cf3c2e13c4e761eb5d36b4.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d8bbb4a09e0ac86bbae46222a90841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5084a907d0a5aab9003b5b342ce14c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49763402b2f2023f0ba64c37924267d3.png)
其中正确命题的序号为
您最近一年使用:0次
2 . 已知
,数列
为
,规律是在
和
中间插入
项,所有插入的项构成以3为首项,2为公差的等差数列
,则数列
的前30项和为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4b5779873cb3f4366dbfdb983dec81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aac186947a2ee83597d9949143fd1f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217b927efe12a98e1082ecd7f035b921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
您最近一年使用:0次
2024-01-02更新
|
742次组卷
|
6卷引用:4.2 等比数列(第2课时)(六大题型)(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)
(已下线)4.2 等比数列(第2课时)(六大题型)(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)(已下线)2024年全国高考名校名师联席命制数学(文)信息卷(七)江西省赣州市南康中学2024届高三上学期七省联考考前数学猜题卷(三)(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)高三数学开学摸底考02(新考法,新高考七省地区专用)(已下线)压轴题05数列压轴题15题型汇总-1
23-24高二上·上海·期末
名校
3 . 定义:对于任意大于零的自然数n,满足条件
且
(M是与n无关的常数)的无穷数列
称为M数列.
(1)若等差数列
的前n项和为
,且
,
,判断数列
是否是M数列,并说明理由;
(2)若各项为正数的等比数列
的前n项和为
,且
,证明:数列
是M数列;
(3)设数列
是各项均为正整数的M数列,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f165a34038d89623948dbe0a669df0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5612ce06759d0f77ca029d10083f7d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)若等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb8cf8df82fd05e5549ce9c1a6f3524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4818548de2563bc81198611cf3468f13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若各项为正数的等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c8a7aaf355cf3ea778c73eea8ae635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de777c4e44546bcfe26ad5b6bb418052.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/292852a3aa9790d661862ff0b67c8971.png)
您最近一年使用:0次
2024-01-14更新
|
1325次组卷
|
8卷引用:期末真题必刷压轴60题(22个考点专练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(沪教版2020必修第三册)
(已下线)期末真题必刷压轴60题(22个考点专练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(沪教版2020必修第三册)(已下线)第4章 数列(压轴题专练)-2023-2024学年高二数学单元速记·巧练(沪教版2020选择性必修第一册)安徽省六安第二中学2023-2024学年高二上学期期末统考数学试卷广东2024届高三数学新改革适应性训练三(九省联考题型)湖北省荆州市沙市中学2023-2024学年高二下学期3月月考数学试题(已下线)模块五 专题5 全真拔高模拟5(北师大高二期中)(已下线)模块三专题2 数列的综合问题 【高二下人教B版】(已下线)模块三 专题4 数列的综合问题 【高二下北师大版】
4 . 已知有穷数列
各项均为整数且是严格增数列,若
,
,则n取最大值时,
的值为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6259e837ae77af00fa394a87a6e6436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2745d50b4dd7700dbcac9fabb88caf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
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2023-11-07更新
|
443次组卷
|
3卷引用:上海市南模中学2024届高三上学期期中数学试题
上海市南模中学2024届高三上学期期中数学试题(已下线)第4章 数列 单元综合检测(重点)-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)山东省招远市第二中学2023-2024学年高二上学期期末模拟数学试题
名校
5 . 数列
满足
为正整数
.
(1)试确定实数
的值,使得数列
为等差数列;
(2)当数列
为等差数列时,等比数列
的通项公式为
,对每个正整数
,在
和
之间插入
个2,得到一个新数列
,设
是数列
的前
项和,试求满足
的所有正整数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcca40df9d18465b63df3e54c447fbb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
(1)试确定实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)当数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4b5779873cb3f4366dbfdb983dec81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217b927efe12a98e1082ecd7f035b921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233427826eb2233641fc3a9805f6d206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.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/54a9fa3fe6f0cb2c66dc7c864785368f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
名校
解题方法
6 . 设等差数列
的各项均为整数,首项
,且对任意正整数
,总存在正整数
,使得
,则关于此数列公差
的论述中,正确的序号有__________________ .
①公差
可以为
;
②公差
可以不为
;
③符合题意的公差
有有限个;
④符合题意的公差
有无限多个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf892b3095141d3458941f5985643fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
①公差
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
②公差
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
③符合题意的公差
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
④符合题意的公差
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
您最近一年使用:0次
7 . 对正整数
,其中
,记
.设
,给出下面四个结论:
①
;
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7be0de417f34f71b91db577831f5c546.png)
③
;
④数列
为等差数列.
其中所有正确结论的序号是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95d411d99cadcc9a40f865663015f03b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db6b222287bc816d81be8eddbb02495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13437600b1f7c2f7d6d7ff59e5ea5474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5589e8c4036c032fd090682d571839e5.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/139552c86e5872edfb63a33c2fce8728.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7be0de417f34f71b91db577831f5c546.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645a3f71d09e5fb727c35b950546a31c.png)
④数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afef75088e4b3a34b682b40599768a2e.png)
其中所有正确结论的序号是
您最近一年使用:0次
8 . 已知数列
的各项均为实数,
为其前n项和,若对任意
,都有
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2bad68e2ccb83471ffb70660c3c267f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d38778e8bf2fab01982062c8216b3a.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
2023-01-08更新
|
1327次组卷
|
8卷引用:2023届上海春季高考练习
2023届上海春季高考练习上海市位育中学2023届高三下5月高考模拟数学试题(已下线)4.2 等比数列(第2课时)(六大题型)(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)(已下线)专题6-1 数列函数性质与不等式放缩(讲+练)-2(已下线)专题7 等比数列的性质 微点1 等比数列项的性质(已下线)等差数列与等比数列(已下线)重难点10 数列的通项、求和及综合应用【九大题型】(已下线)专题04 等比数列(十六大题型+过关检测专训)(2)
名校
解题方法
9 . 设等差数列
满足:
,公差
.若当且仅当
时,数列
的前
项和
取得最大值,则首项
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b46b7492b445dab4594c2a2dd100bb61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61397119098958292030195c5f56d8ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe08722cf9300fe188dbbb71989c06c9.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/e72adb45c60c2f63b46e65ff787302bf.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2022-07-21更新
|
932次组卷
|
5卷引用:4.1 等差数列(第2课时)(十三大题型)(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)
(已下线)4.1 等差数列(第2课时)(十三大题型)(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)四川省遂宁市遂宁中学校2021-2022学年高一下学期期末数学试题(已下线)4.2.2.2 等差数列的前n项和的性质及应用(练习)-2022-2023学年高二数学同步精品课堂(人教A版2019选择性必修第二册)(已下线)专题 11等差数列性质及应用归类(3)(已下线)【练】专题3 数列范围(最值)问题
名校
解题方法
10 . 设函数
,
,
(
,n≥2).设数列
的前n项和
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658f421181d9b3eae6063aa92707f557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3afc1dd528d62c84b130fbcdf1e58050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1033e64a509e56aa51174e145a026671.png)
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