1 . 某校数学兴趣小组有14位同学,他们组成了n个不同的课题组.每个课题组有6位同学,每位同学至少参加2个课题组,且任意两个课题组至多有2位共同的同学,求n的最大值.
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2 . 如图,
、
分别是△ABC、△ACD的重心,
的外接圆与直线BD相交于点P,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc71c35d851ff74646c728756b24efb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/951d73cefe3fed1c5e70210ce71ae2fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5035afd29380c8912a02ac79a7db19b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a69a73f2044f45086374c2e068b548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3269cf61861183004455d640aac8ccf0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/ada6f890-0c6f-474f-a6a8-d92f18e4566a.jpg?resizew=193)
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3 . 已知椭圆C:
的离心率为
,
、
分别为椭圆C的左、右顶点,
、
分别为椭圆C的左、右焦点,B为椭圆C的上顶点,且
的外接圆半径为
.
(1)求椭圆C的方程;
(2)设与x不垂直的直线l交椭圆C于P、Q两点(P、Q在x轴的两侧),记直线
、
、
、
的斜率分别为
、
、
、
.已知
,求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7451b947d1adea22bc04070efdd2b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cfa1e7ffae662aefb49a44c52d4954d.png)
![](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/e82fe25db889399bb3ca4ffd5dd5db84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a61d572ecf27dc02fcbd588f24647b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/130c1bb7866e816804248f5eb8c59417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c68316a6c48b33c53e2725274c8e1d65.png)
(1)求椭圆C的方程;
(2)设与x不垂直的直线l交椭圆C于P、Q两点(P、Q在x轴的两侧),记直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee1d228a6558961e7346d0326207dacf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c69286a11bc6a2641c73542167ce2c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cfdaad60640c4c023a339ffdc459d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95dfc574d8ed4f6e828a9c5c40788d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2562424a83aae7e4b3f8adf90307961a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03b58edb637c5dfa03794f3952de9d83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be76756ea33cd487013256cbe942a3cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9fa1f26b7d3a7a600ad370cfa176f39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ee33f0fa8b278c793a691206b1fb83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05470dc94e4d9eea98d2c533ce576b07.png)
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4 . 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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名校
5 . 已知函数
对一切实数
都有
成立,且 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3471484b64504fc545398f52be830010.png)
(1)求
的解析式;
(2)
,若存在
,使得
,有
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7edac77829e7aec29f8980f577959098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6be06c23c58b16ff4c60c9643e904a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3471484b64504fc545398f52be830010.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09f0d7757d5e899df0a268eab3b0c36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10b997c1b71f6be1a25bcb879d781dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2bc6663b48b3346303be4167a7531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2021-11-27更新
|
1618次组卷
|
7卷引用:福建省厦门第一中学2021-2022学年高一10月数学限时训练(数竞一试)试题
福建省厦门第一中学2021-2022学年高一10月数学限时训练(数竞一试)试题福建省泉州现代中学2021-2022学年高一上学期期中考试数学试题广东省肇庆市第一中学2023-2024学年高一上学期学科能力竞赛数学试题吉林省延边州2021-2022学年高一上学期期末考试数学试题(已下线)专题05 函数的概念与性质常考基础题型-2021-2022学年高一《新题速递·数学》(人教A版2019)(已下线)3.2.1 单调性与最大(小)值——单调性(第1课时)(分层作业)-【上好课】(已下线)第五章 函数的概念、性质及应用(压轴题专练)-单元速记·巧练(沪教版2020必修第一册)
6 . 已知实数
满足
,且
.证明:存在整数
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619acd7f11cc83e79f8a0b4bded6366e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a45404b51ce8cfc4377e5aeddf4eb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d32671db64484de8db437478097733d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4693365ce682a31111d8882174e9b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da1fe9b072e5cbd56c321cd132c84c3.png)
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7 . 已知
.
(1)当
时,不等式
恒成立,求m的取值范围;
(2)求证:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d70266454df40256268b19b055a88.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/044fa22986cfe763ff757f5d3e0e29e2.png)
(2)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44387f425a6e9528e3b6e902848b65d.png)
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2020-05-12更新
|
1341次组卷
|
4卷引用:2019年全国高中数学联赛福建省预赛
8 . 如图,O、H分别为锐角△ABC的外心垂心,AD⊥BC于D,G为AH的中点点K在线段GH上,且满足GK=HD,连结KO并延长交AB于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/bb0b5f94-e86f-455f-afe0-744ae279bf26.png?resizew=177)
(1) 证明:
;
(2) 证明:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/bb0b5f94-e86f-455f-afe0-744ae279bf26.png?resizew=177)
(1) 证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c56961a6826101fcf0141caf725a1.png)
(2) 证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9c916bcf2d632466bed777e36688341.png)
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9 . 已知数列{an}满足
.
(1)记
,求数列{cn}的通项公式;
(2)记
,求使
成立的最大正整数n的值.(其中,符号[x]表示不超过x的最大整数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0db6b6b2595f4bb8cfa3374a31fcfcf8.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf44c0fb145cd897ea09048c7f264b8b.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d5adb2c923b697d7571de9e4ce919f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38b21937bb9a5550917f0b09b98648db.png)
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10 . 已知
,若方程f(x)=0的根均为实数,m为这5个实根中最大的根,则m的最大值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a017b8133131edda48684fca3e803ea4.png)
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