名校
解题方法
1 . 已知等比数列
前
项和为
,且
,
是
与
的等差中项,数列
满足
,数列
的前
项和为
,则下列结论正确的是( )
![](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/4b79a42580dc46cb4ed5a14e09ab5e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77311d40ef50a900cb46680f917f0d7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20071a42c1f9eac2b173d77d37381da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19c06b25f2556bdb4d2e1a42e5cfeb25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
A.数列![]() ![]() | B.![]() |
C.数列![]() | D.![]() |
您最近一年使用:0次
2023-06-17更新
|
640次组卷
|
4卷引用:福建省宁德市2022-2023学年高二上学期区域性学业质量监测(期中)数学试题(A卷)
名校
解题方法
2 . 若数列
的前
项和为
,且满足等式
.
(1)求数列
的通项公式;
(2)能否在数列
中找到这样的三项,它们按原来的顺序构成等差数列?说明理由;
(3)令
,记函数
的图像在
轴上截得的线段长为
,设
,求
,并证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/345307b291e338fbbd2bc86a39f53164.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)能否在数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771991b0812e4ee2d678982c5461b86d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44c9752056ebb05a8e4eee608c34046b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59e7c7a84a4bdb959e95536d0404ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a82433897679bbf03dab49684cbfec2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5bb9e8d8cd3f0a8c7f1c3f239bd351.png)
您最近一年使用:0次
2021-10-18更新
|
1366次组卷
|
10卷引用:上海市松江一中2021-2022学年高二上学期期末数学试题
上海市松江一中2021-2022学年高二上学期期末数学试题上海市大同中学2021-2022学年高二上学期10月月考数学试题新疆维吾尔自治区喀什第六中学2023届高三上学期9月实用性月考(一)数学(文)试题新疆维吾尔自治区喀什第六中学2023届高三上学期9月实用性月考(一)数学(理)试题(已下线)上海高二下学期期末真题精选(压轴60题35个考点专练)-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)上海市嘉定区第一中学2023-2024学年高二上学期期中数学试题(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)广东省2022届高三一模数学试题变式题17-22(已下线)专题11 数列前n项和的求法 微点5 裂项相消法求和(三)(已下线)专题15 数列不等式的证明 微点3 通项放缩法证明数列不等式
3 . 设数列
的前
项和为
,当
时,
,
,
成等差数列,若
,且
,则
的最大值为( )
![](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/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f48b614c438013c270ec084c38441d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94d6b8f10142a7b23ee19cae223f378c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e020389b5472cfdce5becbf5cbead69c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-09-07更新
|
1986次组卷
|
13卷引用:广东省广州大学附属中学等三校2021-2022学年高二上学期期末联考数学试题
广东省广州大学附属中学等三校2021-2022学年高二上学期期末联考数学试题广东省广州大学附属中学2021-2022学年高二上学期期末数学试题(已下线)第02讲 等差数列(核心考点讲与练)-2021-2022学年高二数学考试满分全攻略(人教A版2019选修第二册+第三册)第4章 数列(培优卷)-【满分计划】2022-2023学年高二数学阶段性复习测试卷(苏教版2019选择性必修第一册)(已下线)4.2.3 等差数列的前n项和(2)-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)广东省揭阳市普宁市2022-2023学年高二上学期期末教学质量测试数学试题江西省寻乌中学2022-2023学年高二下学期期中数学试题(已下线)高二数学第一学期期期末押题密卷02卷湖南省长沙市长郡中学2020-2021学年高三上学期入学摸底考试数学试题湖南省长沙市长郡中学2020-2021学年高三上学期开学考数学试题(已下线)2021年新高考北京数学高考真题变式题6-10题四川省泸县第五中学2023届高考适应性考试数学(文)试题四川省泸县第五中学2023届高考适应性考试数学(理)试题
解题方法
4 . 已知数列
的前n项和为
,
且
.
(1)求
的通项公式;
(2)在
与
之间插入n个数,使这
个数组成一个公差为
的等差数列,在数列
中是否存在3项
,
,
(其中m,k,p成等差数列)成等比数列?若存在,求出这样的3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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c1e7ab8b9eb825cbbe42c26f40c6082.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3468a665ac713ab7b400c672f19650a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e260b088f071983f254ce8f5163fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8598379ec01edc16c72c1d3fa3ce81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8904e7018ec79c8b0efdcb3ba67cb7cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2554efe1860dc6c769c34d8cfa6de3e4.png)
您最近一年使用:0次
2022-02-21更新
|
775次组卷
|
2卷引用:人教A版(2019) 选修第二册 实战演练 第四章 数列 易错疑难突破专练
名校
5 . 设
,若无穷数列
满足以下性质,则称
为
数列:①
,(
且
).②
的最大值为k.
(1)若数列
为公比为q的等比数列,求q的取值范围,使得
为
数列.
(2)若
数列
满足:
,使得
成等差数列,
①数列
是否可能为等比数列?并说明理由;
②记数列
满足
,数列
满足
,且
,判断
与
的单调性,并求出
时,n的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](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/a94555857a26590865f337f8c4a93c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3bcb79f2d16d369d4a6e32da7eca6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2a0380833a2210fe0a279413e70eedb.png)
(1)若数列
![](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/a94555857a26590865f337f8c4a93c37.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94555857a26590865f337f8c4a93c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bde2576b383ae3c851529435805b3adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d33296d69857230998bd8152f2457d1.png)
①数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
②记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4188680e5320653753ad0340439cb77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da321100bc025f1099f6a544ad0850a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ade3a1d01605706801e238726e55fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f86dcea6d6efedf628ada9322f13590a.png)
您最近一年使用:0次
2022-07-25更新
|
701次组卷
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4卷引用:第4章 数列(B卷·能力提升练)-【单元测试】2022-2023学年高二数学分层训练AB卷(苏教版2019选择性必修第一册)
第4章 数列(B卷·能力提升练)-【单元测试】2022-2023学年高二数学分层训练AB卷(苏教版2019选择性必修第一册)(已下线)第4章 数列 单元综合检测-2022-2023学年高二数学《基础·重点·难点 》全面题型高分突破(苏教版2019选择性必修第一册)(已下线)第4章 数列 单元综合检测(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)江苏省盐城中学2022届高三下学期5月仿真模拟数学试题
6 . 已知
为坐标原点,圆
的圆心为点
,点
与
关于原点对称,
关于直线
的对称点
恰在圆
上,直线
与直线
交于点
,记点
的轨迹为曲线
.
(1)求曲线
的方程;
(2)设不经过
的直线
与曲线
交于两个不同点
,
,直线
,
,
的斜率依次成等差数列,记点
到直线
的距离为
,直线
上两点
,
的纵坐标之差为
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1cee60321076413034c6085a78cdd47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34517f479fb08f6096d2fb0362f3ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e97fcdcfd6183b976a61ef3222c607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34517f479fb08f6096d2fb0362f3ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)设不经过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b66e4403ef75f4ad01fe86693a1bb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c851a631d70ac8a5efbb6970ba42b91.png)
您最近一年使用:0次
2023-01-14更新
|
282次组卷
|
2卷引用:山东青岛四区县2022-2023学年高二上学期期末考数学试题
名校
解题方法
7 . 已知数列
的前
项和为
,满足:
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0acfcc89e4b7b8cc0b0e4a18326c7bf3.png)
(1)求数列
的通项公式;
(2)对于正整数
,已知
三数构成等差数列,求正整数
的值.
![](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/0acfcc89e4b7b8cc0b0e4a18326c7bf3.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)对于正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1caf641bc92b2e2824775cfe01ddbfe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28192a16d5c7a4b4cb9f0c7e0e0896b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec6fb9e0625b85be3103d317fbb0cca.png)
您最近一年使用:0次
2022-11-05更新
|
546次组卷
|
2卷引用:江苏省苏州市实验中学2022-2023学年高二上学期10月学情调研数学试题
名校
解题方法
8 . 如图所示,椭圆
的左、右焦点分别为
、
,左、右顶点分别为
、
,
为椭圆上一点,连接
并延长交椭圆于点
,已知椭圆的离心率为
,△
的周长为8.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/31/a6061e87-2772-4fdf-a17a-8bfcc66b19d2.png?resizew=300)
(1)求椭圆
的方程;
(2)设点
的坐标为
.
①当
,
,
成等差数列时,求点
的坐标;
②若直线
、
分别与直线
交于点
、
,以
为直径的圆是否经过某定点?若经过定点,求出定点坐标;若不经过定点,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6b94e42869013745050aba059b58dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd4dea64167cc99341d565844c90c03.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/31/a6061e87-2772-4fdf-a17a-8bfcc66b19d2.png?resizew=300)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b24c904b72b2c2c971e4d5a91d9c34b9.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32dc4db82d0071ba7fb82b1b0f359d49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8042834fadd684b2e9484660a484c33a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d25bbf8d72d74356fa8ad78489dc2673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
②若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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2022-01-23更新
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4卷引用:山东省济宁市2021-2022学年高二上学期期末数学试题
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解题方法
9 . 对于集合
且
,定义
且
.集合A中的元素个数记为
,当
时,称集合A具有性质
.
(1)判断集合
是否具有性质
,并说明理由;
(2)设集合
,且
具有性质
,若
中的所有元素能构成等差数列,求
的值;
(3)若集合A具有性质
,且
中的所有元素能构成等差数列,问:集合A中的元素个数是否存在最大值?若存在,求出该最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb94cd811bb002abe6aa21bba1c15a1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f643a40566651bfa8674a4f3876aa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4799766c77d7ac3d405cff9c733646bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc8279d9dd0b7750953cb9e2098b3b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ad74f66489eccb0e2495f82fdb154dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
(1)判断集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74de8c75d2915a610733ef70a902aa4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
(2)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f20167c8cceb39dcdc94f4f33e35959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cfd4044ee9c75b4eeea9df82deb906f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6276b807e05eebe754764c1fc29cb5d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39ad04a78e7320dfb3c2580038cff38.png)
(3)若集合A具有性质
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/636c838e9c10d079e5df897fce90761b.png)
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10 . 已知数列
满足:
,且
,设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942bd32f4bf6736d6cc3843ddc22f1fa.png)
(1)求数列
的通项公式
(2)在数列
中,是否存在连续三项依次构成等差数列?若存在,求出所有符合条件的项,若不存在,说明理由
(3)试证明:在数列
中,一定存在正整数
,使得
依次构成等差数列,并求出
之间的关系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8323901a49cac29afd7d62864f088077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92da859e6cba88630a7c847217081826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942bd32f4bf6736d6cc3843ddc22f1fa.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)在数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(3)试证明:在数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29da8ceff0b6d7d6331d4ea83f4de36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/068618ab8e675da9e66adc8cf9caadf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc25c9a106066dbd774febd721daeb20.png)
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