已知抛物线
的焦点为F,过焦点F的直线C交于
,
两点,若
,则直线AB的方程为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ff82ebdfad5e7de1c7487b0b817a7f.png)
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2022·内蒙古赤峰·模拟预测 查看更多[3]
内蒙古赤峰市红山区2022届高三3月模拟数学(理)试题(已下线)查补易混易错点08 直线与圆、圆锥曲线-【查漏补缺】2022年高考数学(理)三轮冲刺过关(已下线)重难点11九种直线和圆的方程的解题方法-1
更新时间:2022-04-16 11:00:48
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解题方法
【推荐1】过抛物线
的焦点
作倾斜角为
的直线交抛物线于
两点,
为坐标原点,则
的面积为______________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290a56449ad6dd65aec7525c94273f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
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【推荐2】已知实数
,直线
与抛物线
和圆
从左到右的交点依次为
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abd313d4e92a762fb7fb0c1cb65263d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9f526351c74a422806ebe4e83e65606.png)
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【推荐1】抛物线有如下光学性质:由其焦点射出的光线经抛物线反射之后沿对称轴方向射出.今有抛物线
(如图)一条平行x轴的光线射向C上一点P点,经过C的焦点F射向C上的点Q,再反射后沿平行x轴的方向射出,若两平行线间的最小距离是4,则C的方程是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed7102fbf0013d970cef62f321cff45.png)
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【推荐2】已知抛物线
的焦点为
,抛物线
的准线
与
轴交于点
,过点
的直线与抛物线
相切于点
,连接
,在
中,设
,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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