1 . 若正整数n使得方程
有正整数解(x,y,z),称n为“好数”.则不超过2019的“好数”个数是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b954370c24084c8a51b572a70f617fc.png)
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2 . 求证:不存在无穷多项的素数数列
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3db98df39efe5b4b383c79b875b5b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb69ab95d91fd052019c50f5b8c04df.png)
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3 . 数列{an}满足
.
(1)证明:数列{an}是正整数数列;
(2)是否存在m∈Z+,使得2109|am,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48158643c10dee10828f2a143f2c8d5.png)
(1)证明:数列{an}是正整数数列;
(2)是否存在m∈Z+,使得2109|am,并说明理由.
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4 . 已知
为大于
的质数,正项数列
满足
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65bb002beca78a07a6aa09b5f791ed2a.png)
.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](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/65bb002beca78a07a6aa09b5f791ed2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fdb5ba64b50eb792f29c55b3fec96d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d7ea01dd3e55d5c2114e8a3820f3d8.png)
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5 . 求最小正整数
,使得任何
元正整数集合
中都有15个元素,其和能被15整除.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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6 . 已知
为大于3的素数,
的标准分解式为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f380a5ea829ed9f9d0e3d2e6f356b5aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/081e26794e7692d8a748ab2424ebe408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40635d51204c58b25fd032c5d1cafbeb.png)
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7 . 已知正整数
满足
,
.令
,
,
.对任意的
,记
,其中,
表示不超过实数
的最大整数,
表示集合
中元素的个数.证明:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16cd4f79207bdc49ec7d886d8686a973.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ccfce220116839ee685f4106b87142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2aa77d86608e0fd19935621ebac6db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee61b74dbb56f25a3d78e5da5177c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c11e9d27ab71d3ed1869af70f032268e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a502ef923d7a4902efb846352cd755c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/691ccd32650c6c63ed0c9c9edff53e58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc8279d9dd0b7750953cb9e2098b3b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11889a969b05bbedd96af799f6b57a67.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f27136cb1657de96135fa194a02521.png)
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8 . 是否存在增函数
,使得对正整数
(
且
),只要
为质数,就必定不可能有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e29fea3894506d5a18f73527fc9066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2b043b989216035c6fd985f1dd6a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6511aa361c699e2c54148076818b508b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6924a3c5a14a85bd073ba7caa31f33b.png)
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9 . 设
,其中,b为正奇数.定义数列
满足
,
.若正整数
,使得
为素数.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29fca134ddbac482c9821e78e6ab842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1f83d1a6f169d2e621b366431729888.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fc7b499561a3427ed1ef0354689f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772e2d1d7398351c44c55366756f16ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53500b98cf6e4620e77a8271c73549d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76a3ac74cdb64183be40d576145a9cd5.png)
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10 . 设整数
,
,
,
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d463be2ce15e925c24b0929b7b0153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96405d36641237835975484b8ed697e0.png)
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