1 . 设
为给定的正整数.求所有正整数
,使得存在
,
,且
恰有
个不同的质因子.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e193953fa2ae4212325702c3037c78b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2 . 设
,已知
个正实数
,
,…,
使对任意
、
,有
,证明:
·
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01433c50807a7878f60c05f43c3fa652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed437bec35e46d563cb1c6eb443a62b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868e13f39f13bacf278ee1cf4c0dd434.png)
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3 . 已知数列
的前
项和为
,
且
.
(1)证明:
,并求
的通项公式;
(2)构造数列
求证:无论给定多么大的正整数
,都必定存在一个
,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675668080c75d532a01242ab465b411c.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb8d673ef472670f69449a512cc4449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)构造数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d90b7178ae1c099f5cf8c8c9273cc04f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0475bd436d7637c7ad6a18e13ad66d64.png)
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4 . 数列
定义如下:对任何正整数
,
. 证明:存在无数个
的取值,使对一切正整数
,有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a431fb4f75e645d6df106a949d424467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07c64922e458301f1dc5465a28f76aa.png)
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5 . 已知数列
由
,
确定若对于任意的
,
恒成立.求M的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352d9b76dcf639368fa68cae70149802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741a2df0a356c485b78dbb022d3db902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8371e587de90e45311e2d9816ab349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e7f8246c30c59e70350e83a9aab41f.png)
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6 . 已知各项均不小于1的数列
满足:
,
,
,试求:(1)数列
的通项公式;
(2)
的值.
![](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/0de77f65b01d386a2789c6ee80ad3f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a34a33f5899939be1dd89336fa484ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84c49afabfb6b4ebcea99f1343f2e22c.png)
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7 . 给定两个数列,满足
,
;
,
,证明:对任意的
可表为两个正整数的平方和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07741d26969303dff4998158639d9bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0540cf7fe724410ace79b150823b06be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b6d0ed2a4c7d207a6dfd97e9b4d8a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b267a3a5075318577069e70c5ae88644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bcdab3ce2d1bdfb7199925456d9a1f.png)
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8 . 已知数列
满足
,且对所有正整数
有
.求证:存在正整数
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23a3efe1480d61b17519179796ff8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db12cea17eeed89da8a762ee2da3afb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4ca1f153ee9775b6775e0a7b8cfe57.png)
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9 . 正整数数列
满足:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a611750b3d652d59be23dc6db0b7fb35.png)
(1)求
;
(2)求最小的正整数
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a611750b3d652d59be23dc6db0b7fb35.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a9219209bd4544432b4ecbc97741af.png)
(2)求最小的正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a61a96c2782b194c45ac4616c3369b.png)
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