1 . 是否存在正整数
,使得1,2,3,…,
能放在一个
方格表内,使得每行的乘积是相同的?证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e468312d09c6563c9094b710a35a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ceef1abeeef220b4fe5f7d96feedd90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767f5a4746f04db68386fac3970b1ed1.png)
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2 . 数列
的首项
,该数列是公比为
的等比数列.记
,
.
(1)证明:当
时,对一切
,都有
.
(2)当
时,是否存在自然数
,使得对任何自然数
,都有
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5060ad37c403f248c937c1d59af5c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0308ef7b393c5d276e63fd231ceea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7d132982ea9592f4fc83060de2c362.png)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0dacc400d55a1a447d426d7a2312f3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac69e6db1df13ed64756b4f391ae9fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226e35e0bfce719466bc876d46be066c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.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/a34f80ee7d8e493e8a40e411ca6328e3.png)
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3 . 设
,
,…,
是
个正数,把它们顺序放在圆周上,且满足每一个数去除相邻两数的和都是自然数,令
.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae0b861522b18be1753acc4474cbc9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8b928d2210c504b002e5b8d3ea7cba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31836b0a80c65fd90be26c5a44217eb8.png)
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4 . 对于正整数
、
,定义
,其中
、
为非负整数,
,且
.求最大的正整数
,使得存在正整数
,对于任意的正整数
,都有
.证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c05fdebe2bf2a0de86d0b1bef3a0f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c8bda270c828f57ebedc129950fe0e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b4281daee4c7855a5d9fcc86cd37ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ade4f9e75f3a1fd3e484449a6c10eeae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c25757ddfbeeba7ce6a568773328a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b53f531af7052499e0c79695fb5e44.png)
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5 . 设p与p + 2均为素数,p > 3.定义数列
:
,
,其中,
表示不小于实数x的最小整数.证明对
,均有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3082aa4390cb5575e6030d521e3e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6143cb43ad641000ccc3d0502bd2164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32852e2a4e7790a61fcf3532070fe635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4886b31f168a5552d1175e2bb99aa4a9.png)
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6 . 设数列
定义为
,
求满足
的正整数r的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3182bce7056424ee8a96e7c4e1e67e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/936881af37811b57cc4a79c6e06f067b.png)
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