解题方法
1 . 已知
是抛物线
上的一个动点,则
到直线
和
的距离之和的最小值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d31941587483ebe286dc590de99bf7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc8ea0bf79c496f92371df881b433cd.png)
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解题方法
2 . 已知抛物线
:
的焦点为
,过点
的直线交抛物线于点
、
,交抛物线准线
于点
,若
是
的中点,则弦
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
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解题方法
3 . 已知抛物线
的焦点为
,其准线交
轴于点
,过点
的直线交该抛物线于
两点,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebded4be67ed1501ca4a71df47504c81.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce44f5f3d337174863bd8005a7c15624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebded4be67ed1501ca4a71df47504c81.png)
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解题方法
4 . 给出下列命题:
(1)若函数
在
上是减函数,则
;
(2)直线
与线段
相交,其中
,
,则
的取值范围是
;
(3)点
关于直线
的对称点为
,则
的坐标为
;
(4)直线
与抛物线
交于
,
两点,则以
为直径的圆恰好与直线
相切.
其中正确的命题有__________ .(把所有正确的命题的序号都填上)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d55c71f66984d06846dfc9794671973.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79fe3414b32bbd1190b41ed8307f905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d1eec645764636c0e23b05e8f93234.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d50586ff0822c7d00945bc38d67c40a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d69f777281a6319434ccb7e845cc354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f4e703f37a1d6516e6516a7e36f06f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d43eb5d13c51115c0ca3087bb0b50a9.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c454d7cebb5355b61d71cafb47afd72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04eed461026f69fe9ab2c5dc12af8ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/461a7df65c0cc0442bba8de81c7b2362.png)
(4)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.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/99c6875d552e9fff3c7d655f3a59b166.png)
其中正确的命题有
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名校
5 . 已知抛物线
上横坐标为1的点到顶点的距离与到准线的距离相等,则该抛物线的方程为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
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2020-03-21更新
|
282次组卷
|
3卷引用:山西省运城市永济涑北中学2019-2020学年高二上学期12月月考数学(文)试题
名校
6 . 已知抛物线
,过焦点
作直线与抛物线交于点
,
两点,若
,则点
的坐标为 _________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/157c4a262379cd672b3e7d4b924cf0d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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2019-09-14更新
|
760次组卷
|
8卷引用:吉林省长春外国语学校2018-2019学年高二下学期期末考试数学(文)试题
吉林省长春外国语学校2018-2019学年高二下学期期末考试数学(文)试题湖南省岳阳市阳县一中、汨罗市一中2019-2020学年高二上学期10月月考数学试题山西省太原市实验中学2021-2022学年高二上学期12月月考数学试题广东省汕头市东厦中学、汕头市达濠华侨中学2021-2022学年高二下学期阶段一考试数学试题浙江省金华市江南中学等两校2022-2023学年高二上学期12月阶段测试数学试题江苏省连云港市四校(新浦中学、海滨中学、锦屏高级中学、开发区高级中学)2022-2023学年高二上学期期中联考数学试题江苏省苏州市黄埭中学2023-2024学年高二上学期12月月考调研数学试题江苏省苏州市高新区第一中学教育集团2023-2024学年高二上学期12月月考数学试题
7 . 已知
为抛物线
的焦点,点
在抛物线上,若点
是抛物线准线上的动点,
为坐标原点,且
,则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e70bbdee7ad46c68e67b5802c994897c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b797b25fdc1a419b410cb537cb8d72.png)
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2019-05-22更新
|
846次组卷
|
2卷引用:【校级联考】安徽省1号卷·A10联盟2019年高考最后一卷数学文科试题
8 . 若抛物线
上一点
到其焦点的距离为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21872d8f6a518e0a2993ccf7a795ed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec599eecaeb5c54c74f7c2a51f69b586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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2019-04-15更新
|
809次组卷
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5卷引用:【市级联考】海南省海口市2019届高三高考调研测试数学(文科)试题
名校
9 . 已知点P是抛物线y2=﹣8x上一点,设P到此抛物线准线的距离是d1,到直线x+y﹣10=0的距离是d2,则dl+d2的最小值是__ .
您最近一年使用:0次
名校
10 . 过抛物线
的焦点
作直线
与该抛物线交于两点,过其中一交点
向准线作垂线,垂足为
,若
是面积为
的等边三角形,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d7ffb7889a31b267a85f1ea238138e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082e5384a4c127c41abccc6707877273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
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2018-07-07更新
|
301次组卷
|
2卷引用:山西省长治市潞州区第二中学校2019-2020学年高二上学期期末数学(理)试题