1 . 设集合
.若集合
中任意两个数的差均不为99的倍数,且任意两个数的和也不为99的倍数,则集合
中最多含有______ 个元素.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55feceb416b6a432645e485253c4c3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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2 . 求满足不等式组
的整数数对
的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85e4fb9c165fee8b48833abbb317d257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
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3 . 在
中,已知
,三条角平分线分别与对边交于点
、
、
,
的内心为
.证明:
(1)
;
(2)
为等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb76e14c8d658bd21ce72d01e8e6cfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98935ec7e7b4ae37f0f39f0bf7c606b0.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c3135fa20c32d04a270750f77c1f2d.png)
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4 . 已知
为定义在实数集
上的函数,对任意的
、
,恒有
.求
,并计算
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54dad48527a47eab4a5916ab0421cc71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9423225dee4717741ceba039198dd6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba50b0de429edbfc86a9d72ba968bf91.png)
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5 . 在
方格表的方格中任意排布1~36的全部整数,每个方格只有一个数.证明:在方格表中的某行里存在这样两个相邻的数,若取它们中的较小者作为二次三项式
的系数
,较大者作为常数
,则得到的一元二次方程
具有两个不同的实根.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c114f3cc1fd54e5fa3e32fc8a15389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783a7b78d895784b4af75b962bd40f07.png)
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6 . 高一数学竞赛共设有35个考场,甲、乙、丙三所学校的领队各自将本校学生人数相同的考场归为一组.经统计,甲校共有i组,各组的考场数分别为
;乙校共有j组,各组的考场数分别为
;丙校共有k组,各组的考场数分别为
.已知
包含了1 ~ 14的所有整数.证明:能找到三个考场,至少有两所学校在这三个考场中的选手人数各自是相同的.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd94cb1899495e90608ec3f39ab5beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37707cd5cf99dc7c36f2f2d8d42a5103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11dada81a1f9f9ddee628647e0bb78dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74ada2faa1c15867cb6bf4796cbe26f3.png)
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7 . 如图,正方形
被分成了面积相等的8个三角形,若
,则正方形
的面积![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76193ced85f535a8e0f43586682273f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
![](https://img.xkw.com/dksih/QBM/2018/12/13/2095759639011328/2096022248873984/STEM/08cc421b-4871-48a7-bd7d-a446679e95be.png?resizew=202)
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名校
8 . 如图,正方形
被两条与边平行的线段
分割成4个小矩形,
是
与
的交点,若矩形
的面积恰好是矩形
面积的两倍,试确定
的大小,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8856a6bbd1648fef7aaa384366e9016f.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/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/162b4b222bed44d4d18429dd76da6a1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d6ebde2731d7181fda21e8972c51933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896a1058dad705cc6623ab5db3c19c3b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/a9358738-d3ad-45ec-88f1-4f17bb10a35d.png?resizew=157)
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2017-09-02更新
|
207次组卷
|
2卷引用:1998年北京市中学生数学竞赛试题
9 . (1)若整数
满足关系式
,证明:
.
(2)试写出不定方程
的一组正整数解,并对此解验证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3aa7b21846db0187de8f2e8e124df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc3589455bf2ff459f7a6804f7377b55.png)
(2)试写出不定方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3aa7b21846db0187de8f2e8e124df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc3589455bf2ff459f7a6804f7377b55.png)
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10 . 在边长都是正整数的三角形中,周长是2009的三角形与周长是2012的三角形哪一种的个数多?说明理由.
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