已知抛物线
上的点
到其准线的距离为5.不过原点的动直线交抛物线C于A,B两点,M是线段AB的中点,点M在准线l上的射影为N.
(1)求抛物线C的方程;
(2)当
时,求证:直线AB过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15950ec348524d84c6eae6bb8d25a383.png)
(1)求抛物线C的方程;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095d644f94ff84431a617abfef9a65f.png)
2022·陕西西安·三模 查看更多[4]
陕西省西安市阎高蓝周临鄠六区2022届高三下学期三模文科数学试题陕西省西安市阎高蓝周临鄠六区2022届高三下学期三模理科数学试题(已下线)第09讲 高考难点突破一:圆锥曲线的综合问题(定点问题) (精讲)-2(已下线)10.6 三定问题及最值(精讲)
更新时间:2022-05-07 21:19:30
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【推荐2】如图,已知抛物线
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【推荐1】已知抛物线的顶点是坐标原点
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【推荐2】已知抛物线C:
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【推荐1】在平面直角坐标系
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在①②中任选一个补充在上面的横线上,并给出证明.
(注:如果选择两个命题分别证明,按第一个证明计分.)
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【推荐2】抛物线
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