过抛物线
的焦点F的直线交y轴于点A,抛物线上有一点B满足
(O为坐标原点),求三角形
的面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca245f58924fdae9fb575a76ddaa70f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d1951a6b5b284783022c4bbe7557ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7616fd83d02630805d50fac048af867a.png)
更新时间:2020-06-25 14:47:34
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相似题推荐
解答题-证明题
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【推荐1】在平面直角坐标系中,
为坐标原点,
三点满足
.
(1)求证:
三点共线;
(2)已知
,
的最小值为
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7453d507d0c0c7c10d5f73dca6dceb5d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311995bf3e561f255d947b8a75ca0d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f18c358e515979c5eea9a6617ebc151.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】设P是双曲线
右支上任意一点,O为坐标原点.
(1)过点P分别作两条渐近线的垂线,垂足分别是E、F,求
的值;
(2)过点P的直线与两条渐近线分别交于A、B两点,且满足
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b07249c5779b87de9e1d70b514afc3a.png)
(1)过点P分别作两条渐近线的垂线,垂足分别是E、F,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb3ee31f0fbe28b840d3e5a3514d45.png)
(2)过点P的直线与两条渐近线分别交于A、B两点,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f4947ae72c574f1dc8b7b2015d3ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
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解答题-问答题
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解题方法
【推荐1】如图,已知抛物线C:
的焦点为F,
,
,
,
四点都在抛物线上,直线AP与直线BQ相交于点F,且直线AB的斜率为1.
![](https://img.xkw.com/dksih/QBM/2021/5/8/2716860912132096/2717542584352768/STEM/0a3d8f13-07bd-4250-97e6-c0701b0e8175.png?resizew=281)
(1)求
和
的值;
(2)证明直线PQ过定点,并求出该定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a307de32c527dee32c36caef0df84b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ff142ec087a0d0c606a60a14365d8d.png)
![](https://img.xkw.com/dksih/QBM/2021/5/8/2716860912132096/2717542584352768/STEM/0a3d8f13-07bd-4250-97e6-c0701b0e8175.png?resizew=281)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d6e75677951ef1388f76aee5a779149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb6b713f043ceb67da30cbbe128eded8.png)
(2)证明直线PQ过定点,并求出该定点.
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解答题-问答题
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解题方法
【推荐2】已知
为抛物线
上一点.
(1)求抛物线
的准线方程;
(2)过点
的直线l与抛物线C交于A,B两点,且直线
与
的倾斜角互补,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff2595e01e8751886a27862cce04e2d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3e98e89290668bd722c2b3f92d182e.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3627350f7d2ef1a7fb62343407719d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37bfe23b569c680b0e72b4ff2ea42d83.png)
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