1 . 过点
的直线与抛物线
交于
,
两点,线段
的垂直平分线经过点
,
为抛物线的焦点,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed18bd80c6c4142f68e89f4ad44570b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.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/a8e32f16d75ccb62a04970f861827fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c56f5df84331896242be97d7efe670ec.png)
您最近一年使用:0次
2017-10-17更新
|
969次组卷
|
3卷引用:黑龙江省海林市朝鲜中学2018届高三高考综合卷(一)数学(文)试题
名校
解题方法
2 . 以边长为
的正三角形
的顶点
为坐标原点,另外两个顶点在抛物线
上,过抛物线
的焦点
的直线
过交拋物线
于
两点.
(1)求抛物线
的方程;
(2)求证:
为定值;
(3)求线段
的中点的轨迹方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6093eebca8f3ff82ce9298feb197e955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9158f21b372fd0390fab040ad65c586.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9cbc334d6f4b6f92ffdeba67ca441b8.png)
(3)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
您最近一年使用:0次
名校
3 . 若抛物线
(其中角
为
的一个内角)的准线过点
,则
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0289ab24ba4b5361c885dbd7c8a25e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae4bc423bfc519c927a724bda94f8707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5532a691aeee6d35d3f19b237f82f0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
533次组卷
|
4卷引用:【全国百强校】黑龙江省大庆中学2018届高三考前仿真模拟考试数学(文)试题
名校
4 . 已知抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df40ba57bb5819b4aaa38d514500052.png)
,过焦点
作动直线交
于
两点,过
分别作圆
的两条切线,切点分别为
,若
垂直于
轴时,
.
(1)求抛物线方程;
(2)若点
也在曲线
上,
为坐标原点,且
,
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df40ba57bb5819b4aaa38d514500052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75ed10db4b9747a4b6d865b774f6b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda4bd8c7d6a66dc806ccded76ef36b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a24c1fb500b3ef5332132ca955f81e.png)
(1)求抛物线方程;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5246d8912ac7d31d8b94addef8d4a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42b36ced8c0a0f4836bec9a89b30a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2016-12-04更新
|
393次组卷
|
2卷引用:2016届黑龙江省哈尔滨六中高三下四模理科数学试卷
解题方法
5 . 直线
与抛物线
交于
两点,若
,则弦
的中点到
轴的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f616752f1b1dc6235262f4bba95d71af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57dfc9d1109fe41145cc892b5702d9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
A.![]() | B.1 | C.2 | D.![]() |
您最近一年使用:0次
2011·黑龙江·一模
名校
6 . 已知抛物线
,
为其焦点,
为其准线,过
任作一条直线交抛物线于
两点,
分别为
在
上的射影,
为
的中点,给出下列命题:
①
;②
;③
//
;
④
与
的交点在
轴上;⑤
与
交于原点.
其中真命题是__________ .(写出所有真命题的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb4cda8c303228a587b02d47f6dad53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e1b8d2be04779fa5c6ad22f650a21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb4cda8c303228a587b02d47f6dad53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc890342ba48792f572f99e3f8c033a.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827cd8b0355ac39cefe561451c2b8101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7af3d5765382269f380d39b0ffc9d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00be4f773a29342ffc87bcb1e65af540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0e65e147b109f2bbfd3a3f502bbc3a.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00be4f773a29342ffc87bcb1e65af540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59ac8c5700ce2de9a140c4adea742168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9806df6df27bf715c81c4a93fc6517c5.png)
其中真命题是
您最近一年使用:0次
2017-03-06更新
|
298次组卷
|
8卷引用:2011届黑龙江省哈三中高三第一次模拟考试数学理卷
(已下线)2011届黑龙江省哈三中高三第一次模拟考试数学理卷2016-2017学年安徽省黄山市高二上学期期末质量检测文数试卷2016-2017学年安徽省黄山市高二上学期期末质量检测数学(理)试卷2016-2017学年安徽省黄山市高二上学期期末质量检测数学(文)试卷湖南省衡阳市第八中学2018-2019学年高二下学期第一次月考数学(理)试题(已下线)对点练60 抛物线的性质-2020-2021年新高考高中数学一轮复习对点练(已下线)专题40 抛物线及其性质-42016-2017学年安徽省黄山市高二上学期期末质量检测理数试卷
7 . 已知圆
与抛物线
的准线交于
,
两点,且
,则
的值为___________ .
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572571092992000/1572571098554368/STEM/0710351f05694808af7f60951ae7e394.png?resizew=104)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572571092992000/1572571098554368/STEM/f829dbe501954cafabcbd4fa81084117.png?resizew=101)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572571092992000/1572571098554368/STEM/5a07c79c005f4e8e9ce5747d74456c34.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572571092992000/1572571098554368/STEM/f0dd6370b3c14290a104dd98332eb84c.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572571092992000/1572571098554368/STEM/fbae823d98ab45e49e7b335ca4505ba5.png?resizew=75)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572571092992000/1572571098554368/STEM/7486175f588845529237558ab501f3cb.png?resizew=17)
您最近一年使用:0次
2016-12-04更新
|
634次组卷
|
2卷引用:2016届黑龙江省哈尔滨师大附中等校高三第一次模拟理科数学卷
8 . 在平面直角坐标系
中,点
在抛物线
的准线上,则实数![](https://img.xkw.com/dksih/QBM/2016/11/5/1573128523964416/1573128529854464/STEM/ace6649c5e8a47aa80ee07860ac5c0ed.png?resizew=29)
______ .
![](https://img.xkw.com/dksih/QBM/2016/11/5/1573128523964416/1573128529854464/STEM/234b1473c7ee4ebb9d573b6896369ae1.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2016/11/5/1573128523964416/1573128529854464/STEM/48f48a983925445a9f8e9c04a6d721c6.png?resizew=67)
![](https://img.xkw.com/dksih/QBM/2016/11/5/1573128523964416/1573128529854464/STEM/29b62367cfba45b39812030b55ec016c.png?resizew=56)
![](https://img.xkw.com/dksih/QBM/2016/11/5/1573128523964416/1573128529854464/STEM/ace6649c5e8a47aa80ee07860ac5c0ed.png?resizew=29)
您最近一年使用:0次
2011·黑龙江·二模
9 . 已知抛物线
的焦点为
,点
为抛物线上的动点,点
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088fcdd595455906a1a7080d630611f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd82b6adaf001abb2328f10b6a7a914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0115869de235cdafcbe7ec405ceb3f62.png)
您最近一年使用:0次
解题方法
10 . 已知抛物线
的焦点为
,动点
在
上,点
与点
关于直线
:
对称,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9b4081755dd5d63529f95fab4ca51a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf2fbf1f8f0a60143e3d62933287ed3.png)
A.![]() | B.![]() | C.![]() | D.2 |
您最近一年使用:0次