1 . 如图,设A是由
个实数组成的n行n列的数表,其中aij (i,j=1,2,3,…,n)表示位于第i行第j列的实数,且aij
{1,-1}.记S(n,n)为所有这样的数表构成的集合.对于
,记ri (A)为A的第i行各数之积,cj (A)为A的第j列各数之积.令![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870d9073bb6e80038a75f78882af0296.png)
(Ⅰ)请写出一个A
S(4,4),使得l(A)=0;
(Ⅱ)是否存在A
S(9,9),使得l(A)=0?说明理由;
(Ⅲ)给定正整数n,对于所有的A
S(n,n),求l(A)的取值集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767f5a4746f04db68386fac3970b1ed1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8513848f0793f49d5eff420964a793b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870d9073bb6e80038a75f78882af0296.png)
a11 | a12 | … | a1n |
a21 | a22 | a2n | |
… | … | … | … |
an1 | an2 | … | ann |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
(Ⅱ)是否存在A
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
(Ⅲ)给定正整数n,对于所有的A
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
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2 . 已知数列
中,
,
(
),则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0468eec40a6f3f0f2162d21ac0e754.png)
________
![](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/d387bb0f5cd99b8c2a73d2ce60fff96a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0468eec40a6f3f0f2162d21ac0e754.png)
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3 . 已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3830c962a99ad42a82cc6327a79cc592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5921d5addb93829e146437d4058da5f6.png)
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2020-02-05更新
|
251次组卷
|
3卷引用:第五章 统计与概率 5.1 统计 5.1.4 用样本估计总体
4 . 正整数数列
满足
,
满足
,
.在
中两数列的公共项的个数是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/204599d8ea20f6c9067108e219408e77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da1295a23c862d4015738ea74a68de07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4613271f782a90ab580131d09d03d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31acd0e41081a835a3a4aafb0e1bf8a4.png)
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5 . 已知数列
的前
项和
满足
,
,且
.
(1)求数列
的通项公式;
(2)设
,
为数列
的前
项和,求使
成立的最小正整数
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/fcbe4d8a61d5d09e526ce573c1d02b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2693734765399876e9e93cdb110231c4.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5572dd65d61abddd96dccb9e80e2892a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.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/a00db49ab3eb71571bb450052bafc00f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2019-01-28更新
|
924次组卷
|
7卷引用:湖南省株洲市第二中学2021-2022学年高二下学期“同济大学”杯数理化联赛数学试题
湖南省株洲市第二中学2021-2022学年高二下学期“同济大学”杯数理化联赛数学试题山西省运城中学校2022届高三冲刺模拟(一)数学(文)试题2018年全国高中数学联赛福建省预赛江西省宜丰中学、宜春一中、万载中学2021届高三3月联考数学(理)试题(已下线)2021年高考数学押题预测卷(新高考卷)01广东省高州中学2022-2023学年高二下学期期中数学试题(已下线)高二下学期期末押题卷01-【同步题型讲义】2022-2023学年高二数学同步教学题型讲义(人教A版2019选择性必修)
6 . 对于函数
,若
,则称
为
的不动点.已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba99a5c5661eedaef4b36ade1a7c5c5.png)
,
,且在其定义域内有唯一的不动点.
(1)求
表达式;
(2)若数列
满足
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f66a2b3d90f0d935d6c8ebaf675349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba99a5c5661eedaef4b36ade1a7c5c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13183911a001dda671b9f96b93c844c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9da4fdfdddc259dcef9fdd4b826b64.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcff52f954dde6861c61684a52099f7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdea9205e182291d6d9dda380c591ff9.png)
您最近一年使用:0次
7 . 设
为集合
的
个不同子集,为了表示这些子集,作
行
列的数阵,规定第
行第
列的数为
则下列说法中,错误的是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad2d4a8a90e4a919354f36053f24cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5de998be2d94d13a52c269c53d2cdfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73194bfd35063da2bc7202359f3b60a.png)
A.数阵中第一列的数全是0当且仅当![]() |
B.数阵中第![]() ![]() |
C.数阵中第![]() ![]() |
D.数阵中所有的![]() ![]() |
您最近一年使用:0次
2010高三·甘肃·竞赛
名校
8 . 已知
是公差为正数
的等差数列的前
项之和.若
在
时取到最小值,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926a3abb308a47ffca6f1c5e3792ec16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c345907ebe27888332b1b44c666cc47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
您最近一年使用:0次
名校
9 . 在数列
中,
,若
(
为常数),则称
为“等差比数列”,下列对“等差比数列”的判断正确的为.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b5985d67dafea2f91cbe41dc147ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.![]() | B.等差数列一定是“等差比数列” |
C.等比数列一定是“等差比数列” | D.“等差比数列”中可以有无数项为0 |
您最近一年使用:0次
2018-12-21更新
|
684次组卷
|
8卷引用:考点11 数列的综合应用-2022年高考数学一轮复习小题多维练(新高考版)
(已下线)考点11 数列的综合应用-2022年高考数学一轮复习小题多维练(新高考版)广东省深圳市福田区红岭中学2021-2022学年高二上学期期末数学试题辽宁省沈阳市市级重点高中联合体2021-2022学年高二下学期期测试末数学试题2018全国中学生数理化创新能力大赛(预赛)高三数学试题(已下线)专题08 数列(2)-2020年新高考新题型多项选择题专项训练(已下线)期末测试卷(重点卷)-2020-2021学年高二数学十分钟同步课堂专练(苏教版必修5)江苏省扬州市江都区大桥高级中学2020-2021学年高二上学期学情调研(一)数学试题河南省许昌高级中学2022-2023学年高三上学期定位考试数学试题
10 . 设
.若
,则数列
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e352e56475e3c1b9269a006e2b3dd9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04cbe3fa82978123e003ba5900bee057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
A.递增 | B.奇数项增,偶数项减 |
C.递减 | D.偶数项增,奇数项减 |
您最近一年使用:0次
2018-12-15更新
|
413次组卷
|
4卷引用:山东省日照市2022届高三下学期校际联合考试(二模)数学试题