1 . 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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2 . 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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3 . 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
4 . 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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5 . 已知数列
满足
.
(1)证明:当n≥2时,
;
(2)当n≥4时,求
表示不超过实数x的最大整数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0449dd294ede7811635ebd98595c21.png)
(1)证明:当n≥2时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986cb57bb3477c4c9dc1518b1d4b77d3.png)
(2)当n≥4时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38cf77cceeea84669232fd3981f5529a.png)
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2014高三·江苏·竞赛
6 . 证明:存在无穷多个正整数
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4527058bf4d5a9bd2f3ab172e8732f21.png)
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7 . 已知数列
满足
,
a2(k∈若对于所有的
,均有
,求k的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf278d1b0afbae8e55bb58c33eab8ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e7b2d825b7ccad2aad05568b4f4439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d489449a96e523d0c91e0a44bfcc5ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25809c4ad8f07e80b10fdb5b40d6dfae.png)
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8 . 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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