1 . 对于数列
,若存在常数
使得
对任意正整数
成立,则称
是有界数列.已知数列
满足递推式
,求证:
(1)若
,则
不是有界数列.
(2)若
,则
是有界数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2480f87a11c4cd450bc9454ea7276722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbb510a00c96650e85fa03afed69d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.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/32bcb64530e6818698cc3d83c87a93c1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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2 . 求正整数n的最大值,使得对任意一个以
为顶点的n阶简单图,总能找到集合
的n个子集
,满足:
当且仅当
与
相邻.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07bcd047595eb49ca5978ee91b3c33aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8c80883caf31045f1aa796c679a0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252bab154aa5bdc9b4bce4c0d43aaf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da8bec0aeeab406ccb815a85cce9d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0539fe8b83a5427649b7a52216112cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f323258ad650bbd6228f50643c8457cd.png)
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3 . 已知有n(n≥4)支足球队参加单循环赛,每两队赛一场,每场胜方得3分,负方得0分,平局各得1分,所有比赛结束后发现,各队的总分构成公差为1的等差数列,求最后一名得分的最大值.
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4 . 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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5 . 已知
,令
求
能取到的不同的整数值的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d4e786a33522b7aefe882287b08e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de0e2b8d9624c41f309cc348d932498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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6 . 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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7 . 设
为实数,
.证明:
(1)把
写成无穷乘积有唯一的表达式
其中,
为正整数,满足
;
(2)
是有理数,当且仅当它的无穷乘积具有下列性质:存在
,对所有的
,满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/948eb26dc27646285335664baad48ec0.png)
(1)把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947ce9ff5b37676e23feab8cbc331c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/697e84689167caa36ac89184035aab56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d2fa14ee14c2b79da6dbc875b61b8e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef594556457f4989f78e8ad1038ff4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f1d645832a371aaaf1a2720517f073f.png)
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8 . 将一枚棋子放在一个
的棋盘上,记
为从左、上数第
行第
列的小方格,求所有的四元数组
,使得从
出发,经过每个小方格恰一次到达
(每步为将棋子从一个小方格移到与之有共同边的另一个小方格).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f92a1ac461e9b71247cd59e12cb2d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4d5ca4e251ff0e503a26f9a7375326.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/c969c72b1466caaa73129f2ee968af3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3044d760ef9d263537c142478ac35c19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f88bcbc7c997bd3f56170ce4c997c8.png)
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9 . 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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10 . 设
为互不相等的正整数,它们的最小公倍数为
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2b043b989216035c6fd985f1dd6a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/525e5ce4e91a4738e90809b1b949d6df.png)
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