1 . .设数列
定义为
证明:
(1)当
时,
;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2543c7c9a423923b80e8992386dc0901.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e468312d09c6563c9094b710a35a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7570de15dc9f0ce429965d285074474.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebf13e7dcac5fdc3042ebae642d29f5.png)
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2 . 已知函数
满足①
均大于0;②对于任意的
,
均为整数;③
.试判断,对于每个整数
是否为整数,并对你的结论给出论证.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/363b32cd053fc0d99c6054316c788fdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d10449bc77d692a7270e0f20a68cdf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b2a9a675d8aaca772c6c17b4ef3de66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e089c2e3a6115d65f54e9e3142518bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b0674f15d84e56ddd6a9b300d81910.png)
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3 . 已知
为正实数,且
.求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c27a9af7db04a611063978a7990745e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/945a8324921d6e1a91bbedf790411042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dda68dc6df793bfba36b9572c8cde8.png)
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4 . 设集合
,
是从
到
的映射,且满足
.试求所有的三元数组
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b8cc9eadd876375c632dcae8dc84e73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4ff0af96ea467337cb30c4c765b5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0064142f65846425d1e25782b1863543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d55fbe086258e934156b453a59b649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee815c692753896c5e2167eca23b202d.png)
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2006高三·山东·竞赛
5 . 以椭圆
(a>1)的短轴端点B (0,1)为直角顶点作椭圆的内接等腰
.若这样的三角形有且只有一个,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dae6629e0dbf18af625cb804874afb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8008eab22184d57ef7d4258f2188f5c8.png)
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6 . 已知自然数
有20个正整数因子(包括1和本身),它们从小到大依次记作
,
,
,…,
,且序号为
的因数为
.求自然数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d0252c1b2f7d2a84b5c985d19d547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d1f025483eed99b835b7135fb0024a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/539a28c7d6b3a050a0b8d145725227b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6646818ada4ee9f0bf53548c290813ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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7 . 设
,记
.求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/956d9844a534254824c70b642d7aa83b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eee88a500a24fa77770e98166ca7e90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63893b9929381dfb49c4b1940cc5866f.png)
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8 . 设
、
为给定整数,集合
.证明:对任意的
,有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cd5a7791739d2f3d16481eee6ba13e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf142a356077dc2dbe12fe81742a76ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08dc7e58830e20d5cfa10dc324df4400.png)
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9 . 解方程组:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4235df43a31bd03a916f3628151503dd.png)
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10 . 设
是给定的自然数,求所有正数对
,使得
是
的因式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78741a97a0a948f1e681344c559bc590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7f01589663ccab70a8ded1df3becd0.png)
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