1 . 证明:存在无穷多个棱长为正整数的长方体,其体积恰等于对角线长的平方,且该长方体的每一个表面总可以割并成两个整边正方形.
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2 . 求最小的正整数
,使得存在一个
的数阵满足如下条件: (1)每一个数均属于集合
; (2)记
为数阵中第
行中的数组成的集合,
为第
列中的数组成的集合
,则
,
是4026个不同的集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5311a22867a26d56314456b295cc0d9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d878c148fbe54dd59228fbf86eeb80ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f95e54a9b7c66c97dc6ee6161a25c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/407f2faadb10cd787d49783b06a32462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9238f5a421fdf8ba4c8a1a6642d50c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c273738a6cf6d268972acf713ca617.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9446a03ba0ba93f26ed79ab43cf3dbd8.png)
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3 . 已知
个实系数二次函数
的判别式
都相等.若对任意的
,方程
均有两个不等的实根,求证:方程
也有两个不等的实根.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac19e2a797cd0a408316988a63b3755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3533c86c4bbbe2d1e33d2333f11765.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02851e3945be42052e14025a7c7891ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937c09d82c480e4d67f8a48d3f66c5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b78064fe7cc2d226064a48a307d47a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013f1b26468c2d5c843658aee3072937.png)
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4 . 由单位正方形组成的无限格阵的每个单位正方形内都写有一个整数.若每个方格内的整数等于其上方和左方与其相邻的两个方格内的整数之和,且存在一行
,其中,所有方格内的数都是正整数.记
下面一行为
,
下面一行为
,⋯⋯证明:对于每个正整数
,
上不能有
个方格内的整数都是0.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fb44db1dc864ff4901be1e10da79747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fb44db1dc864ff4901be1e10da79747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b104090ea2ac34be58a76a4e0e95cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b104090ea2ac34be58a76a4e0e95cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df1d9b712b639c8b6809c9f3ae03706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a611aefd3eeb2e20980daae5af1970b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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5 . 已知数列
满足
,
.给定奇质数
和正整数
满足
,证明:
的充分必要条件为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/909736dad505d81be43aef91e6309bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5108053cdc0b7d5d1813bbf96689ae5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c226ece1d984f7733996dbe669b6875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f95f1bdd88065ccc93d4f6410b9f3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580fd18d9d137cf66ed9c24b91f6463c.png)
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6 . 一个人上台阶可以一次上1级台阶,也可以一次上3级台阶,或者一次上4级台阶.若这个人上
级台阶总共有
种走法,证明
为平方数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2bfe05ef6780e5f032ca3a7c96811a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07f7a46323e7630dd8cd5cffcb11a5d.png)
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7 . 设
,其中,b为正奇数.定义数列
满足
,
.若正整数
,使得
为素数.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29fca134ddbac482c9821e78e6ab842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1f83d1a6f169d2e621b366431729888.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fc7b499561a3427ed1ef0354689f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772e2d1d7398351c44c55366756f16ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53500b98cf6e4620e77a8271c73549d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76a3ac74cdb64183be40d576145a9cd5.png)
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8 . 在一次数学会议上,任意两位数学家要么是朋友,要么是陌生人.在进餐期间,每位数学家在两个大餐厅中的其中一个就餐,每位数学家所在的餐厅中包含偶数个他(或她)的朋友.证明:数学家能被分到两个餐厅中的不同分法的数目是2的正整数次幂(即形如
,其中,
是某个正整数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98aa5f1acb67ec4580d240c2525e4d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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9 . 设
是定义在自然数集合
上并在
上取值的函数,满足:对任何两个不相等的自然数
,有
.
(1)求
;
(2)假设
是100个两两不相等的自然数,求
;
(3)是否存在符合题设条件的函数
,使
,证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/145b9b7961cf1f359862430bbca15465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f74081cfd8d2457ff2d575d439f13b5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e38fffbc7ab9882480f4faa72390e23.png)
(2)假设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7c76c1ceb8cfc22b108c55565d2b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/977b29dc3c945f0177201359056566d0.png)
(3)是否存在符合题设条件的函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524ee808469860f15659f9353b3d647e.png)
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