抛物线
的焦点为
,
,
是抛物线上与原点不重合的两点,弦
经过点
,并且
,则
的面积是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c153027427477bcd0a7228b14ce96cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42bf84cc13b8c50ec5fb19fcea0fc369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b929a31d169a811004f0ecd6b7984e61.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2019-01-19 14:32:08
|
【知识点】 抛物线的应用
相似题推荐
单选题
|
适中
(0.65)
解题方法
【推荐1】已知抛物线
:
的焦点为
,
是坐标原点,斜率为
的直线
交抛物线
于
,
两点,且点
,
分别位于第一、四象限,交抛物线的准线
于点
.若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6bdac20e214b2cb3bd07f8d4778dcca.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62afd1a72c30967cbc7d8bbeffeeaf81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba4008db39a0f1fa636a8c64c3bb1d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26e4e5cef2ff6c0709a064d4038f6e4.png)
A.![]() | B.![]() | C.2 | D.![]() |
您最近一年使用:0次
单选题
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适中
(0.65)
名校
【推荐2】如图所示,汽车前灯反光镜与轴截面的交线是抛物线的一部分,灯口所在的圆面与反光镜的轴垂直,灯泡位于抛物线的焦点处.已知灯口的直径是24cm,灯深10cm,那么灯泡与反光镜的顶点(即截得抛物线的顶点)距离为( )
![](https://img.xkw.com/dksih/QBM/2022/3/2/2927659639185408/2929584900276224/STEM/8d4dfe33-c21e-41c0-9308-cb5042e70f3f.png?resizew=104)
![](https://img.xkw.com/dksih/QBM/2022/3/2/2927659639185408/2929584900276224/STEM/8d4dfe33-c21e-41c0-9308-cb5042e70f3f.png?resizew=104)
A.10cm | B.7.2cm |
C.3.6cm | D.2.4cm |
您最近一年使用:0次