2023高三·全国·专题练习
1 . 已知数列
满足
.
(1)证明:
是正整数数列;
(2)是否存在
,使得
?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3f0a8c6cf53d0b0b71ccf8e6f5226a.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39891fee58e55b44b4103f46c3608891.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c4122bdc1b2a61097735c85b2dd655c.png)
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2022高三·全国·专题练习
2 . 已知0≤n≤18,19m+n=20212022,则n=__ .
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3 . 设
为一个质数,且
也是一个质数,证明:
的小数表示形式中包含0至9的所有数码.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ca4c3cdbb63bf2e3c1c3d67d46d3acc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cbadc8f735cb509c99741c41f32d097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1eccdf91bcfb339dee1e546ebcf17bc.png)
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4 . 对每个正整数n,定义
为从1到n中所有与n不互质的正整数的和.求证:若
且
,则
是合数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fcec7af3520884b173b29bda6c657a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9ba50ede8ef97b843accf839fef5c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d9712c3b25f3030e166e136d3a4686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae9dd56551121a5b88be4dc6910c9ec0.png)
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5 . 正整数
,且
的素因子个数不超过2,对于任意整数
,若
,则有
成立,求证:
是质数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2794218743c2cccfe26d67c803ca094b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7c6588252b11da61d1bb7f9b7766a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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6 . 设
证明:对整数
,
,必有一个模4余1的素因子.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9beb3fc78a72d29aefd329ebd137cc80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5d0a73f50b3e4583f1c1b6d6bf0d18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
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7 . 设a,b为不超过12的正整数,满足:存在常数C,使得
对任意正整数n成立.求所有满足条件的有序数对
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173f1085b31a963c1f331b3d19787e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30277e0be448b4955903e81e8795e45d.png)
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8 . 存在正整数数对(a,b)满足
的正整数k的个数为_______ .([a,b]表示正整数a与b的最小公倍数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c887a7a8993e5e0b99639af7f3fa7d9c.png)
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9 . 求满足
的所有正整数对
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7472fd6abdb28f2c670628e4ed9db5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceb955cff0a243b938fe2d2d1e8a5dc.png)
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10 . 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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