1 . 给定
个(
)互不相等的实数
,所有的
个和
(
,
,
)中互不相同的数恰好有
个的充分必要条件是
,
,…,
成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5d0a73f50b3e4583f1c1b6d6bf0d18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f846d93390223b563770b676ee30b06c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772dee834857b4fc72ed84cca530590b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059a6c5a965c335b8da05e697da2c7c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9612cb52aacd0b66fc1ba1297267c9c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97d4ad3c68d0a1b7ddad9b0a99ba48e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b71af6590f0f369c164a054a8b63bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629455b181f187fe9b0edd9d66431ef0.png)
![](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)
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2 . 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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3 . 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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4 . 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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5 . 用
表示由0和1组成的长度为
(如00101,10100都是长度为5)的排列中没有两个1相连的排列的个数,约定
.试证明:
(1)
,
;
(2)
可被3整除,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fcec7af3520884b173b29bda6c657a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51eb2613dda00677d447c986cac505bc.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb9f7acd7bc7d80ed498eb17e9e92411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c02c6dcfcc7810d0dd620d92cd80137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d165046175c70690335c3c8ce97b9d.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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7 . 设函数
且f(x)的最小值为0.
(1)求a的值;
(2)若数列
满足a1=1,an+l=f(an)+2(n∈Z+),记Sn=[a1]+[a2]+…+[an],[m]表示不超过实数m的最大整数,求Sn.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63864fd07f0cb2624e5f7d4496bb46f8.png)
(1)求a的值;
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
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8 . 设
,令
,
,证明:对任何正整数n,有
.①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1510639120a1883e66f13794a9df9179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57bd57ae11e8ba6d5f329814ea6ae38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97909dd7ffe8c3941798129c9ab81a31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abece478d06e6f32167bbce0ac3ef30e.png)
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9 . 已知在正整数n的各位数字中,共含有
个1,
个2,⋯,
个n.证明:
并确定使等号成立的条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d04a8b7a7595251251b8e0b7e665e8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5453ec6a9e8b96357c888ea863ddcf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/649fad26925be63140de835a44b78ed3.png)
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2018-12-07更新
|
370次组卷
|
3卷引用:2016年全国高中数学联赛山西赛区预赛试题
10 . 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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