1 . 设V是空间中2019个点构成的集合,其中任意四点不共面某些点之间连有线段,记E为这些线段构成的集合.试求最小的正整数n,满足条件:若E至少有n个元素,则E一定含有908个二元子集,其中每个二元子集中的两条线段有公共端点,且任意两个二元子集的交为空集.
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2 . 设
是一个由
和
构成的
行
列的数表,且
中所有数字之和不小于
,所有这样的数表构成的集合记为
,记
为
的第
行各数之和
,
为
的第
列各数之和
,
为
、
、
,
、
、
、
、
中的最大值.
(1)对如下数表
,求
的值;
(2)设数表
,求
的最小值;
(3)已知
为正整数,对于所有的
,
,且
的任意两行中最多有
列各数之和为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2f1a22af68a6412b9d2af4eb7fb9cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48db62be9b9e543796a94745e43bec09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f27029eb88f6bc77cf22518513b0c0f.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/bbce46ea5090c80b6ac12411049f8627.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2734a146cfaf5cd3c281472f1b6e9407.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/b3e7ff69177e5a5a170b5a6dd29288d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eef4aca9ca885dd5ced5b8bf650efee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8caca8d368c13e9a593ada4e69e5ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9901526b5bfb8b746c588de345aafd47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14232cf91d19f1d74fdee2551c311fbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39c18603f29a411c55cc2759678fa9b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a41360795843b2e56b1f67d58a325ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a3bea06d992e3d84124843444194b5.png)
(1)对如下数表
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eef4aca9ca885dd5ced5b8bf650efee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bd7c73a969b208da8fdf8d91d862c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eef4aca9ca885dd5ced5b8bf650efee.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed661b1f63aa69ed802ef490373026bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1435b3715cf6666516b26ef6c1e206ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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3 . 一次循环赛中有2n+1支参赛队,其中每队与其他队均只进行一场比赛,且比赛结果中没有平局.若三支参赛队A、B、C满足:A击败B,B击败C,C击败A,则称它们形成一个“环形三元组”.求:
(1)环形三元组的最小可能数目;
(2)环形三元组的最大可能数目.
(1)环形三元组的最小可能数目;
(2)环形三元组的最大可能数目.
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4 . 已知
、
、
为大于3的整数,将
的立方体分割为
个单位正方体,从一角的单位正方体起第
层、第
行、第
列的单位正方体记为
.求所有有序六元数组
的个数,使得一只蚂蚁从
出发,经过每个小正方体恰一次到达
.【注】蚂蚁可以从一个单位正方体爬到另一个与之有公共面的相邻正方体.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e501498525706e23481ea58ce976bf14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d2d7ddd7ef3b6cde30018bc6a84b9e0.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/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfafed7db6cff996207b09467861c943.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87667931a731baabd15b8ae0e4f85631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d628cb618f06522eb93756473a7766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5ea15f97a5c8db50249b2bc02f0f5b.png)
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5 . 给定平面上的点集
,
中任三点均不共线.将
中所有的点任意分成83组,使得每组至少有3个点,且每点恰好属于一组,然后将在同一组的任两点用一条线段相连,不在同一组的两点不连线段,这样得到一个图案
.不同的分组方式得到不同的图案.将图案
中所含的以
中的点为顶点的三角形的个数记为
.
(1)求
的最小值
;
(2)设
是使
的一个图案,若将
中的线段(指以
的点为端点的线段)用4种颜色染色,每条线段恰好染一种颜色.证明存在一个染色方案,使
染色后不含以
的点为顶点的三边颜色相同的三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a91692e4495a039c3736a2aa090f91e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23235a862992c52b040ba326ee263439.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23235a862992c52b040ba326ee263439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e93d8fb77f5bd2c0fc690752dfd771.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350c5d8dc46eb245caa8e828597b30d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7acacd1de8f64feef7bd1dc61662d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350c5d8dc46eb245caa8e828597b30d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350c5d8dc46eb245caa8e828597b30d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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6 . 设
为正整数.若数字
构成的排列
满足
(1)
;
(2)
;
(3)
,
则称此排列为“N型”的.记
为所有N型排列的个数.
(1)求
、
的值;
(2)证明:对任意正整数
,
均为奇数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3860f7f37da2dbf7b1df41b29503397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c59221a068df563c785546c389be677.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2750b2fb577342d21ff3a2c58bf3f358.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bbf794832ea65fa70d1d2d12214575.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fcdd09aae5c9a30d3b0bea09ef57d7.png)
则称此排列为“N型”的.记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8904e7018ec79c8b0efdcb3ba67cb7cb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
(2)证明:对任意正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8904e7018ec79c8b0efdcb3ba67cb7cb.png)
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7 . 求1,2,···,n的排列
的个数,使得
对正整数k=1,2,···,n成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3413aee76d321d038d9628c95ad6e2b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e8942fd3e92278aee512b3f1f711282.png)
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