1 . 已知数列
满足
,
.若数列
构成的集合为有限集,则
、
应满足______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377221b80387b8e290b371762f27a496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8c4cccf2add30adbd44f6cff0c619c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad481cbfb67ac9cdbc0537f3de23b022.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
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2 . 对于任何正整数
,记
为
的各位数字的平方和,对
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fd479a128cdf57c7b8139a54175d09.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c63c23825e61ec74a0851c8b9f591d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6bb8a8727c7c59617db8b94e0623e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fd479a128cdf57c7b8139a54175d09.png)
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3 . 求所有正整数
,使得给定序列
,
,中的每一项都是平方数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550904843e7d2f286f7a72997cd21393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f14192117991bd1440464548d6e689ee.png)
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4 . 对于正整数
,定义
为
的个位数字.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb8706a6cc1a7eab7538120cb0ee78a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7f7fa1557be82514e05579b85692a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb8706a6cc1a7eab7538120cb0ee78a.png)
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5 . 已知数列
:1,3,5,7,…,从第5项开始
是
的个位数.问:
能否被4整除?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d2cfb4990ffdcb44908db2b7c6948f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f56534d73e6cb462465f9ac256e77495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b845bf8125dda079e8d9a2bf9cfb6c4.png)
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6 . 对于整数
,其个位数码用
表示,记![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a170727faeae74de9f88906d8b068ec3.png)
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b7ce83219bfd97751320fcb14128f2d.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f81f2a0196b06fc56a7e8a6463d179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a170727faeae74de9f88906d8b068ec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e1143cc30cf9373205e699b915d5e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b7ce83219bfd97751320fcb14128f2d.png)
您最近一年使用:0次
7 . 数列
为
.其构造方法是:首先给出
,接着复制该项1后,再添加其后继数2,于是,得
,
;然后再复制前面所有的项
,再添加2的后继数3,于是,得
,
,
,
;接下来再复制前面所有的项
,再添加3的后继数4,于是,得前15项为
.如此继续下去.试求
及数列前2006项的和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ea25e958c9b00288347965f121cc7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f966272f7781790ff27e40db6b525253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb334e165679c6cb500c994cffa47147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a4127fad0f7e1b6da4097ed0fe4024f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2da0ff9dc73d62f8162fc3de186150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259b2e755105c0ee479eabf7265a76a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73abda0b2c65194421a02d6dc1380f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e6a1b0cf1299008b00be81b739dd99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82fb53ed3da0cb5f5a3368a9266b26a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3f227c3825fc063a565199d76b111f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17f78969d9ac865772e51b9b5514868e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d244f65048067faea0f4f65a9cde861.png)
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8 . 已知数列
的通项公式为
,记
求所有的正整数n,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a2382509672c212c85534f1bb3a425b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/035f0ed1814ee8fe69c12e847c9ad844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874fc33ce721a417a4434af20c6a3fa6.png)
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9 . 给定数列
,
,且
,则
=____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60302649eb940748da818199e55da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4754a68996b2efc7869679fd4843c9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eef94c66dce8811d5c36c6bccf6264b.png)
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10 . 已知数列
满足
且
.若该数的前1999项之和为2000,则前2000项之和等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9758d7707198a643d1ac091f3dda6eff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3172a2dfbce3ce32fd909ff548e75b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f966272f7781790ff27e40db6b525253.png)
A.1999 | B.2000 | C.2001 | D.2002 |
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