1 . 在
中,
为
的中点,
,
,
,点
与点
在直线
的异侧,且
,则平面四边形
的面积的最大值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1f4f255d191786f7d330d278868c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7650cede07c4758a9b3bb1da4553acc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c94ff4614059e5e91ed304b150d886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dbb62e863cc189ecd0eb917f19253ed.png)
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2018-05-09更新
|
2159次组卷
|
5卷引用:【全国百强校】河南省南阳市第一中学2018届高三第十八次考试数学(文)试题
2 . 已知抛物线
,斜率为
的直线交抛物线于
,
两点.若以线段
为直径的圆与抛物线的准线切于点
,则点
到直线
的距离为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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3 . 圆
的圆心到直线
的距离为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e318cefab1d71238b6a770e9d5fe154e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527644f53abbcfd2e8457da020cb0262.png)
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2018-02-27更新
|
459次组卷
|
2卷引用:河南省濮阳市2018届高三第一次模拟考试数学(文)试题
4 . 已知直线
的方程为
,抛物线为
,若点
是抛物线上任一点,则点
到直线
的最短距离是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23fc11a3a7592c68b20f93bdde2ed3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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2017-12-05更新
|
519次组卷
|
3卷引用:河南省中原名校(豫南九校)2018届高三上学期第四次质量考评(期中)数学(理)试题1
河南省中原名校(豫南九校)2018届高三上学期第四次质量考评(期中)数学(理)试题1河南省中原名校(豫南九校)2018届高三上学期第四次质量考评(期中)数学(理)试题2(已下线)《2018届优生-百日闯关系列》数学专题四 专题四第一关
名校
5 . 若对于任意一组实数
都有唯一一个实数
与之对应,我们把
称为变量
的函数,即
,其中
均为自变量,为了与所学过的函数加以区别,称该类函数为二元函数,现给出二元函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aded986b3674593739b22d4843c40af.png)
,则此函数的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9c5c7cffee04e1a5545ea43e6f0f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1326a39cbb9a2cbb148ea33e5aa66462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aded986b3674593739b22d4843c40af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634bc4f898896f2adff0a53dddc1cd1e.png)
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6 . 某村有2500人,其中青少年1000人,中年人900人,老年人600人,为了调查本村居民的血压情况,采用分层抽样的方法抽取一个样本,若从中年人中抽取36人,从青年人和老年人中抽取的个体数分别为
,则直线
上的点到原点的最短距离为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fbd107ae67aed8030e6331943a2da9e.png)
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2016-12-04更新
|
318次组卷
|
2卷引用:2016届河南省新乡卫辉一中高考押题一理科数学试卷
解题方法
7 . 如图,从点
发出的光线,沿平行于抛物线
的对称轴方向射向此抛物线上的点
,经抛物线反射后,穿过焦点射向抛物线上的点
,再经抛物线反射后射向直线
上的点
,经直线反射后又回到点
,则
等于_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21320585c32c9b56ed9c6d3af04250b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad4379899a49ee71bd1a165ef793a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/11/15e05cdc-b161-4ad9-a1cb-786a9f43f102.png?resizew=237)
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