解题方法
1 . 设抛物线
的焦点为
,过点
作倾斜角为
的直线交抛物线于点A,
(点A位于
轴上方),
是坐标原点,记
和
的面积分别为
,
,则
( )
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01b9de38c02e28c475bf639727b59e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c525358262126a51fbb598d58f3e1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a39f04d1c3551403dbbed35deb01232.png)
A.9 | B.4 | C.3 | D.2 |
您最近一年使用:0次
2021-05-17更新
|
171次组卷
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2卷引用:宁夏中卫市2021届高三第二次优秀生联考数学(理)试题
解题方法
2 . 已知抛物线
的焦点为
,点
在抛物线
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/983449cf-bc22-49eb-851a-c43c5bec58fd.png?resizew=157)
(1)求抛物线
的方程;
(2)若
,求点
的坐标;
(3)过点
作两条互相垂直的直线分别交抛物线
于
四点,且点
分别为线段
的中点,求
的面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f5179dea5472d2dd3a732673f462d27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be92f0e0012a7696c78e3e00513edefd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/983449cf-bc22-49eb-851a-c43c5bec58fd.png?resizew=157)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c9aa5dc8e688868ad3eac88714cd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e15d188f2c16bd519fba975c4a86db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6bf66a5f30d94390f59c6a3d1ae6c46.png)
您最近一年使用:0次
2021-05-05更新
|
654次组卷
|
5卷引用:宁夏中卫市2021届高三三模数学(理)试题
宁夏中卫市2021届高三三模数学(理)试题上海市嘉定区2021届高三二模数学试题(已下线)【新东方】高中数学20210527-010【2021】【高二下】(已下线)课时38 抛物线-2022年高考数学一轮复习小题多维练(上海专用)(已下线)2022年1月浙江省普通高中学业水平考试数学仿真模拟试卷C
3 . 已知点
是抛物线
的焦点,
是其准线
上任意一点,过点
作直线
,
与抛物线
相切,
,
为切点,
,
与
轴分别交于
,
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/1deeacc1-afde-4aeb-ac54-ef6fa5b5a7cc.png?resizew=218)
(1)求焦点
的坐标,并证明直线
过点
;
(2)求四边形
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7ad3432ac96b0a38beaa7f2edc3499.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/1deeacc1-afde-4aeb-ac54-ef6fa5b5a7cc.png?resizew=218)
(1)求焦点
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
(2)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61485b8657009f66b6b3a947c5ef2370.png)
您最近一年使用:0次
2020-06-24更新
|
443次组卷
|
3卷引用:宁夏中卫市2021届高三二模数学(文)试题