名校
1 . 已知集合
是集合![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17827b180be7fe6257a170ac4f14ba0e.png)
的一个含有
个元素的子集.
(Ⅰ)当
时,
设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e935b5d0182c2382de28c46cb968af3.png)
(i)写出方程
的解
;
(ii)若方程
至少有三组不同的解,写出
的所有可能取值.
(Ⅱ)证明:对任意一个
,存在正整数
使得方程![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46f8ac04c5eb2e4e7e8a913a847871f.png)
至少有三组不同的解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fc1f6effac6aa2324b0ef6c99174557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17827b180be7fe6257a170ac4f14ba0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e247a6c2ea97079d54f63f8c4c56f10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c537b60bc58957d4b11a33bc8a4bd.png)
设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e935b5d0182c2382de28c46cb968af3.png)
(i)写出方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71896c05d453bb24a4e637e20ce29453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17f9324832985ae572814995c623205a.png)
(ii)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f093c9f09fb55bdce94f35d51656472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(Ⅱ)证明:对任意一个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e924e716802ea0e503812d4168de1ae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46f8ac04c5eb2e4e7e8a913a847871f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c920b1a53dc473254e2b0f5b4fd4db0a.png)
您最近一年使用:0次
2018-03-31更新
|
1346次组卷
|
6卷引用:北京市第二中学2020-2021学年高一上学期期中考试数学试题
解题方法
2 . 若
.
(1)求证:
;
(2)令
,写出
的值,观察并归纳出这个数列的通项公式
;
(3)证明:存在不等于零的常数
,使
是等比数列,并求出公比
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38a1677be1ac78862fad877d7515b3fc.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c653177884385ae15b71438aac4e704d.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed6fe44bc49b478979589face327799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(3)证明:存在不等于零的常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fdd8c87dfee13a0ed775d9c256336a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
您最近一年使用:0次
2018-03-18更新
|
793次组卷
|
3卷引用:陕西省西安市鄠邑区2021-2022学年高二下学期期中文科数学试题
名校
3 . 设实数a,b,c满足a+b+c=1,则a,b,c中至少有一个数不小于 ( )
A.0 | B.![]() | C.![]() | D.1 |
您最近一年使用:0次
2018-03-04更新
|
848次组卷
|
4卷引用:福建省尤溪县2018-2019学年高二下学期三校期中联考数学(文)试题
4 . ⑴当
时,求证:
;
⑵已知
,
.试证明
至少有一个不小于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03425cbe241074fd29fa5bb2b1da5820.png)
⑵已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39f015b400f6a000a581ef05c9f814ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
您最近一年使用:0次
2018-01-20更新
|
1025次组卷
|
6卷引用:上海市实验学校2020-2021学年高一上学期期中数学试题
上海市实验学校2020-2021学年高一上学期期中数学试题江苏省泰州市2017-2018高二第一学期期末考试数学(文科)试题(已下线)第1章集合与逻辑精讲精练-2020-2021学年高一数学期末考试高分直通车(沪教版2020,必修一)(已下线)1.2反证法(第3课时)上海市南洋模范中学2022-2023学年高一上学期10月月考数学试题上海市曹杨第二中学2023-2024学年高一上学期第一次月考(10月)数学试题
5 . 设
是由
个实数组成的
行
列的数表,满足:每个数的绝对值不大于
,且所有数的和为零,记
为所有这样的数表组成的集合,对于
,记
为
的第
行各数之和(
),
为
的第
列各数之和(
),记
为
,
,
,
,
,
,
,
中的最小值.
(1)对如下数表
,求
的值.
(2)设数表
形如:
求
的最大值.
(3)给定正整数
,对于所有的
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e70354d6ca5ad9f6b4592fac0b5e559.png)
![](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/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05ab5a644bb884ffd6819e4e94435e1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/000e9e75e2f8dd236356d84eb28332fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5405fe6cce8945a4f08a09c9506bdeda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65bad3343f0e29460ead5b54771f362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8af5e28ee9a70e1b2a09157e7bdbc81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f01cfc245e926581bdb125e0fba733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ba5c6f604da3afa5c18d368fb12060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30773f6541752c8d133db5662ccee553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d137142642163af066957fe19218ed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e5512fd3a1a6cb24d44933b943dc1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260bcd4709ef67852ef6e2de9841e75d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af2bb6f225862039961601a07e7d7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9624751c77e7b93a0166bbdc302cdc6.png)
(1)对如下数表
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ba5c6f604da3afa5c18d368fb12060.png)
![]() | ![]() | ![]() |
![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4bf13913ced47b384e3eda145b7076.png)
![]() | ![]() | ![]() |
![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ba5c6f604da3afa5c18d368fb12060.png)
(3)给定正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56274b0777443d016a0b54fe531f393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ba5c6f604da3afa5c18d368fb12060.png)
您最近一年使用:0次
名校
6 . 设m,n,t都是正数,则m+
,n+
,t+
三个数( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3d2bf75448aa9369e6578df5d7980c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0530cdbb53c2ce94ff206d9976d91aea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4992cc6e26922cb198677b3294a715f4.png)
A.都大于4 | B.都小于4 |
C.至少有一个大于4 | D.至少有一个不小于4 |
您最近一年使用:0次
2018-04-17更新
|
400次组卷
|
6卷引用:吉林省长春市一五0中学2018届高三上学期期中考试数学(文)试题
吉林省长春市一五0中学2018届高三上学期期中考试数学(文)试题2017届山东省菏泽市高三上学期期末考试数学(理)试卷12017届山东省菏泽市高三上学期期末考试数学(理)试卷22019届高考数学(理)全程训练:天天练42 推理与证明(已下线)2017-2018学年度下学期高中期末备考【通用版】高二【精准复习模拟题】C【拔高卷02】【理科数学】(教师版)陕西省安康市汉滨区七校联考2021-2022学年高二下学期期末理科数学试题
7 . 证明下列问题:
(1)用分析法证明:当
,
时,
;
(2)证明:对任意
,
,
,
这
个值至少有一个不小于
.
(1)用分析法证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc65d6eb9b63f96d80b54ec9893aee8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a9d76abf66f9f7cd133d85485387df.png)
(2)证明:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e83f00ae3022d03ee0a9ac3532821762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749d0e03dc286f2a835768d4ac5f07a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3f76ac49f967977d8757117ee183ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
您最近一年使用:0次
2017-12-08更新
|
297次组卷
|
5卷引用:安徽省合肥八中2017-2018学年高二第二学期期中考试数学(理)试题
8 . 已知
是由正整数组成的无穷数列,该数列前
项的最大值记为
,第
项之后各项
,
,
的最小值记为
,
.
(1)若
为
,
,
,
,
,
,
,
,
,是一个周期为
的数列(即对任意
,
),写出
,
,
,
的值.
(2)设
是正整数,证明:
的充分必要条件为
是公比为
的等比数列.
(3)证明:若
,
,则
的项只能是
或者
,且有无穷多项为
.
![](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/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39222f0687c9124bddb35544bcc7798.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e37ec9529b548c4ba899cf5bf9138eb.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a662a381e0867ce9d871c7a8e71f0d37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6268630d5e5288048d32f4aa5c8bc02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c171ff5c2728e7cf00a88f88de14f308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a6cd655790dcd7f9dd30df72bcbe01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95c31e29a88bc9a8a3f929f8318afef.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23275b6970ad4a359cd1585b0df6ad70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(3)证明:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd79a3b3f98440fd7f473ce4afc13cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
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10-11高二下·浙江温州·阶段练习
名校
9 . 设
,且
,
,
,用反证法证明:
至少有一个大于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6775bea8fabfdc16ca55ceb1e6f8ba4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35145c6bd54d904e555257339f05c4b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7db3e2866da0dea46876756afef71a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923b510a1bafed676e050d63b6775e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
您最近一年使用:0次
2019-04-26更新
|
735次组卷
|
12卷引用:2015-2016学年安徽省合肥一中高二下期中文科数学试卷
2015-2016学年安徽省合肥一中高二下期中文科数学试卷【全国百强校】安徽省黄山市屯溪第一中学2018-2019学年高二下学期期中考试数学(文)试题江苏省连云港市锦屏高级中学2018-2019学年高二下学期期中数学(理)试题陕西省商洛市洛南县2018-2019学年高二下学期期中数学(理)试题安徽省安庆市怀宁县第二中学2019-2020学年高二下学期期中线上检测数学(文)试题(已下线)2010-2011年浙江省文成中学高二下学期第一次月考文科数学(已下线)2011-2012学年浙江省嵊泗中学高二第一次月考数学试卷(7-8班)(已下线)2012年苏教版高中数学选修2-1 1.2简单的逻辑联结词练习卷高中数学人教A版选修2-2 第二章 推理与证明 2.2.2 反证法(2)【全国百强校】河南省南阳市第一中学2017-2018学年高二下学期第二次月考数学(文)试题(已下线)2019年4月14日 《每日一题》文数选修1-2(期中复习)-每周一测江西省赣州市石城县石城中学2019-2020学年高二下学期月考数学(文)试题