1 . 已知
为坐标原点,函数
图象与
轴的一个交点为
,与
轴交于点
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9448bf1d6136b3a108e7ea60506ad39.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4991f5aea1d23a639bffc86a48b80243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4420ef2452903556b13d76a7b6adb90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9448bf1d6136b3a108e7ea60506ad39.png)
您最近一年使用:0次
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2 . 已知在
软件的控制台中,输入“
,
)”,按回车键,得到的4个1~20范围内的不重复的整数随机数为
,则这4个整数的标准差为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b0a0ceec43a9bae6dc1addaad2888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8775d285df214f2cb4b0cbc875602c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add3cf855ea73f75ef52434192ac2cf1.png)
A.![]() | B.![]() | C.40 | D.10 |
您最近一年使用:0次
2024-06-17更新
|
174次组卷
|
4卷引用:专题10 中位数、平均数、方差、直方图等归类(2) -期末考点大串讲(苏教版(2019))
(已下线)专题10 中位数、平均数、方差、直方图等归类(2) -期末考点大串讲(苏教版(2019))河南省创新发展联盟2023-2024学年高一下学期第三次月考(5月)数学试题广西重点高中2023-2024学年高一下学期5月阶段性联合调研考试数学试题河北省邢台市邢襄联盟2023-2024学年高一下学期第三次月考数学试题
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3 . 已知函数
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda318adf65c6b6fd45f651365f52346.png)
(1)求
的最大值
(2)写出
与
的大小关系,并给出证明
(3)试问
能否作为
三边长?若能,给出证明,并探究
的外接圆的半径是否为定值?若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1044dcf4fba551e1b7fbfeb895ea08c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda318adf65c6b6fd45f651365f52346.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b692262286e03cc0536598789fab8699.png)
(2)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88fd5c1ef0fc722337a4984834829c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e7bb46b41cd3f1f9b5621c20bf7fe07.png)
(3)试问
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b799aaa36edd0d10fc38925ce2e55045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2024-06-12更新
|
160次组卷
|
2卷引用:江苏省江都中学、江苏省高邮中学、江苏省仪征中学2023-2024学年高一下学期5月联合测试数学试卷
解题方法
4 . 在棱长为1的正四面体
中,P为棱
(不包含端点)上一动点,过点P作平面
,使
,
与此正四面体的其他棱分别交于E,F两点,设
,则
的面积S随x变化的图象大致为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398a7cdc39e756d8f7f7ee1185579b37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0924d39475d22d6ce04fbca2bfff2d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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5 . 我国许多地方都有风格迥异的古塔.现在在某塔底共线三点
处分别测得塔顶P点的仰角为
,
,
,且
,设该塔高为
,示意图如图,则该塔高![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5516a7ad03e49c26d9a6303365664fb.png)
________ m.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de303eb9ff8ccfc0b6ebdf8380456fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5516a7ad03e49c26d9a6303365664fb.png)
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名校
解题方法
6 . 柯西是一位伟大的法国数学家,许多数学定理和结论都以他的名字命名,柯西不等式就是其中之一,它在数学的众多分支中有精彩应用,柯西不等式的一般形式为:设
,则
当且仅当
或存在一个数
,使得
时,等号成立.
(1)请你写出柯西不等式的二元形式;
(2)设P是棱长为
的正四面体
内的任意一点,点
到四个面的距离分别为
、
、
、
,求
的最小值;
(3)已知无穷正数数列
满足:①存在
,使得
;②对任意正整数
,均有
.求证:对任意
,
,恒有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a8a1b208f491296432e9e6bf0e91c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0653d6a0e8778ad47b06d5f6b88cffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/419c991c4022ef12d4801e119018b587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f31a068fb311eff550b3088a212fb2f0.png)
(1)请你写出柯西不等式的二元形式;
(2)设P是棱长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d0252c1b2f7d2a84b5c985d19d547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d31659f106fba3c9750661eb0e3c3eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dde93376f5d29f8f7d501122759b0ab.png)
(3)已知无穷正数数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c24ecf9e59082e563372b12981d03fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ee33826e02eda7aa6221649355a5709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9db6b0bf3d360830fff618193c595b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a33ac34aa03dc7f0a5faad6dc664ec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5818ede14d21f6df9ef9c2bfe09286c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca1d86c9f078347773f700fee49d1d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d191d6de821fbb06a51b5a20112db6de.png)
您最近一年使用:0次
2024-05-20更新
|
510次组卷
|
4卷引用:江苏省南京市东山高级中学南站校区2023-2024学年高一下学期期末考试数学试卷
7 . 某同学测得连续7天的最低气温分别为
(单位:
),若这组数据的平均数是中位数的2倍,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da87f325170047a4e96bf497c88bcddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de96374212b9a5df820d78d10e7d1291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
A.2 | B.3 | C.6 | D.7 |
您最近一年使用:0次
2024-05-13更新
|
1528次组卷
|
6卷引用:专题08 统计图表与用样本估计总体必考点-《期末真题分类汇编》(江苏专用)
(已下线)专题08 统计图表与用样本估计总体必考点-《期末真题分类汇编》(江苏专用)江苏省南通、扬州、泰州七市2024届高三第三次调研测试数学试题(已下线)9.2.2总体百分位数的估计+9.2.3总体集中趋势的估计+9.2.4总体离散程度的估计【第二练】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)第九章 统计(基础卷)-重难点突破及混淆易错规避(人教A版2019必修第二册)(已下线)必考考点9 统计 专题讲解 (期末考试必考的10大核心考点)四川省遂宁市射洪中学校2024届高三高考考前热身数学(文)试题
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8 . 由于四边形不具有稳定性,所以求四边形面积公式需要有限制条件.我们将四个点在圆上的四边形称为圆内接四边形,圆内接四边形具有对角互补的性质.印度数学家婆罗摩笈多发现了圆内接四边形的面积公式为
,其中
、
、
、
分别为圆内接四边形的4条边,
,与海伦公式有类似之处.已知在圆内接四边形
中,
,
,
,
,则四边形
的面积为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f9a99467e1c9715852266155be6a9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575008e0b065f0d535251a041203f99f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515965c22d2950b592c096c6e3bdfd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bcffaa7a79cedadb925149e28e39a43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
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解题方法
9 . 在锐角
中,
,它的面积为10,
,
,
分别在
、
上,且满足
,
对任意
,
恒成立,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345078b37bdf02f53100140507c85bde.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6168bceb8119e8e2290ccc35b6ccc0e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc57614c316ede4c0a0ab3d533e21bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721fc29059eafb153d24020dbaefee29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd59a5621e55f43dd7e78aa7cbfaffae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f370a1d4dd341e5ab1774a66c66c1204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345078b37bdf02f53100140507c85bde.png)
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2024高三下·全国·专题练习
10 . 如图,已知
是
的垂心,且
,则
等于( )
![](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/b6df40eff7ee933766046dd1aa53ab2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8196337d759c33632aa0dc3d4ad50716.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次