1 . 求证:数列
中一定有2022的倍数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69719252d1232ef3ce59579f51104c81.png)
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2 . 若一个直角三角形中两条直角边都是整数,且周长是面积的整数倍,则称其为“
三角形”,则这样的“
三角形”共有______ 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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名校
3 . 如图,给定外心为
的锐角
,令
分别为
到对边的垂足.
为
的外接圆在
和
处的切线的交点.一条经过
且垂直于
的直线交直线
于
为
在
上的投影.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80273dbcfcd2fda629a42d425ff25199.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e30c0a5c92f50dce1f7624709950ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ca00309261a540934d9b3ed9ba05b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95381ea2e4234a389f04150ff11660ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/73eec771-3787-4927-b668-78515fb9d732.png?resizew=198)
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4 . 甲、乙两人分别进行投硬币和掷图钉试验,每人各进行100次试验.设
为前k次试验中硬币正面向上的次数,
为前k次试验中图钉针尖朝下的次数,记
.
(1)若
,问是否存在常数P,不论试验过程中
如何变化,均存在某个
,使得
?若存在,求出所有P的可能值;若不存在,请说明理由;
(2)若
,问是否存在常数Q,不论试验过程中
如何变化,均存在某个
,使得
?若存在,求出所有Q的可能值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233427826eb2233641fc3a9805f6d206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115e6f9387ea866bc7a9065bb256f855.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae727a3da730ebf0c3e2d6673d7fdb91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe0f61ec213734b7ae080719fa5cdd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afe2b62374f95f9d569a6d5739dda128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9f668c772ae36645251661e083ce7f8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c5596c8546e9600062fea9f799f251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9778f679a2495d92a52b36e5e86d4b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afe2b62374f95f9d569a6d5739dda128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6d82d629fe8d24b2d8a14a71a8bbf.png)
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5 . 定义:如果甲队赢了乙队,乙队赢了丙队,而丙队又赢了甲队,则称甲乙丙为一个“友好组”.如果20支球队参加单循环比赛,则友好组个数的最大值为__________ .
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2023-02-07更新
|
1565次组卷
|
3卷引用:浙江省金华第一中学2022年全国高中数学联赛一试考前押题最后一卷
6 . 已知
,求最大的实数
,使得对任意大于2022的正整数
及实数
,存在集合
的一个子集
满足
对所有
恒成立且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3c5cb4d381a7d02ed31e3d92ce4306e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c6971463b9839ecc1c2352ae0afb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0478ec4c7dcce9fa624789a6223eb53d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44c4dce884147e801b50675b9c0714e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e64c35495f9f68ad197ba30902915c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d81314852212a08f2e6d36338d0368a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0a9f3aaedf6f256f10159eaf262a5b.png)
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7 . 设
为整数,数列
定义为
,
,且对任意
都有
.试求所有的
,使得这个数列的每一项都是完全平方数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7bf0d4b73924e85ee5be8d6b170ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18aa1cccf2f341a7886ca7a22d63513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01fc0bf43fa7dcffcf1daebc1b0830c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97bccd30b914efbdf1bcedfb60d63b1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5575ee73675d9fb24280bb3d8d33361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0b397225aafbf5906a2b928c8f2947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab4717e4827480f0f6f4ded85e52eab.png)
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8 . 如图,已知
内接于抛物线
,且边
所在直线分别与抛物线
相切,F为抛物线M的焦点.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/9363e490-d4f9-4149-82da-1203d0f10886.png?resizew=200)
(1)边
所在直线与抛物线M相切;
(2)A,C,B,F四点共圆.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12bc980a6ff5fe01b746c65af072a05e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19409d6d120387b3bccd934c4911bb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd646f98b097a1b09f0b8a76ec399340.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/9363e490-d4f9-4149-82da-1203d0f10886.png?resizew=200)
(1)边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)A,C,B,F四点共圆.
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9 . 正数
,
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fdeba282b028321696be7f90f2cbfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e2b49651d75b65c000f41a92c613508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a28a010582034341a048b08b77f6596.png)
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10 . 已知
,
,…,
是集合
的n个非空子集,如果对于任意的i,
,均有
,则n的最大值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9721059d158853671eaf19e39769b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8db4b168ddbcba90ac9b31d36a0432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64e11e77f3276edde5c0a9f2057beb44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a42daf2970136f21f3e5b3b2f96fe44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac30abcc83eecff9e2cb8dabc1d10ac8.png)
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