名校
解题方法
1 . 设抛物线
的焦点为
,过点
作直线
与抛物线分别交于两点
,若点
满足
,过
作
轴的垂线与抛物线交于点
,若
,则
点的横坐标为__________ .
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a8557898f1c943a431801ecfb06ed84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0a0328dde917c3e6d0f1ca9ddb6027b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2017-02-27更新
|
877次组卷
|
5卷引用:【校级联考】湖北省郧阳中学、恩施高中、随州二中三校2018-2019学年高二下学期期中考试数学(文)试题
2 . 抛物线顶点是坐标原点,焦点是椭圆
的一个焦点,则此抛物线的焦点到准线的距离是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9645e4bbf8c1126d8c30719f2dee3651.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-12-31更新
|
127次组卷
|
4卷引用:陕西省榆林市第十中学2022-2023学年高二上学期期中数学试题
名校
3 . 在平面直角坐标系xOy中,一动圆经过点
且与直线
相切,设该动圆圆心的轨迹为曲线E.
(1)求曲线E的方程;
(2)设P是曲线E上的动点,点B、C在y轴上,
的内切圆的方程为
,求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d66e9d52546beeea016d6d7d3f0ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c98a7f3a8bf384b1dfc1d34aebd46d2.png)
(1)求曲线E的方程;
(2)设P是曲线E上的动点,点B、C在y轴上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e383fcc122f267043fbafe0972bfb900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
您最近一年使用:0次
2016-12-04更新
|
567次组卷
|
3卷引用:四川省成都石室中学2021-2022学年高二上学期期中考试数学(理)试题
解题方法
4 . 已知抛物线C:
的焦点为F,点
,N是抛物线C上一点,当
取得最小值时,
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0261104a7c308433a0c0508ff20ea29a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356547c08d2cd7ba5a6aaf412266d7b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a1622b71bf051bfd14c79b2c75eca58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a33181b27b10690b4913595f8c1f46e.png)
A.7 | B.5 | C.![]() | D.![]() |
您最近一年使用:0次
名校
5 . 已知抛物线
在第一象限内的部分上一点
到抛物线焦点
的距离为4,若
为抛物线准线上任意一点,则
的周长最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5249a7413e43a2579b4343b2ec58b2c7.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/9374cdec65a41dc616f6f099551880d6.png)
您最近一年使用:0次
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6 . 已知
,直线
:
,若动点
到点
的距离比它到直线
的距离小
,
(1)求动点
的轨迹方程
;
(2)直线
过点
且与曲线
相交不同的两点
、
,若
,求直线
的直线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2347bec7975dab2b8bce2fd19b1237d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd24f3c4bc9f9a75d4b28630bb630d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/bdaa19de263700a15fcf213d64a8cd57.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/58168edb2306922360573f6ba14e90c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
您最近一年使用:0次
2020-01-06更新
|
156次组卷
|
2卷引用:广西壮族自治区百色市田东中学2019-2020学年高二上学期期中数学(理)试题
7 . 点
是抛物线
上一点,则
到
的焦点的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ac6188f40414f76bc754dee4a75809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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8 . 已知抛物线
的焦点为
,准线为
,点
是
上一点,点
是直线
与
的一个交点,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d804d794b113cac3a26961bf8ef29f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1ba86ffc6e5542b62319848c14acaa.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf4e0a17ced4673f1639686c3c8cad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d804d794b113cac3a26961bf8ef29f6.png)
A.![]() | B.3 | C.![]() | D.6 |
您最近一年使用:0次
2017-04-28更新
|
631次组卷
|
4卷引用:安徽省铜陵市第一中学2016-2017学年高二下学期期中考试数学(理)试题
9 . 过抛物线
的焦点作两条互相垂直的弦
,则
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97014f42ed79f223a6c89883d811f500.png)
A.1 | B.2 | C.![]() | D.![]() |
您最近一年使用:0次
11-12高二下·辽宁大连·期中
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10 . 已知抛物线x2=4y的焦点F和点A(-1,8),点P为抛物线上一点,则|PA|+|PF|的最小值为( )
A.16 | B.6 | C.12 | D.9 |
您最近一年使用:0次
2018-03-28更新
|
396次组卷
|
6卷引用:2011-2012学年辽宁省庄河六中高二下学期期中考试文科数学试卷
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