名校
1 . 已知
为抛物线:
的焦点,过直线
上任一点
向抛物线引切线,切点分别为A,
,若点
在直线
上的射影为
,则
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b556b1a9944719cf423e90f8df16c773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65368687df4d7e3b9304e85ec4de354c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27a39b3b4d644c572cd92301f88e8cc4.png)
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2023-01-06更新
|
906次组卷
|
3卷引用:河南省郑州市第十一中学2022-2023学年高三上学期1月份线上考试理科数学试题
名校
解题方法
2 . 过原点且相互垂直的两条直线分别交抛物线
于A,B两点(A,B均不与坐标原点重合),则抛物线的焦点到直线AB的最大距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f4123c19136d3a4dc040dce8e34e14.png)
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解题方法
3 . 《九章算术》是我国古代内容极为丰富的数学名著,第九章“勾股”,讲述了“勾股定理”及一些应用.直角三角形的两直角边与斜边的长分别称“勾”,“股”,“弦”,且“勾2+股2=弦2”设直线
交抛物线
于
两点,若
恰好是
的“勾”"股”(
为坐标原点),则此直线
恒过定点 __________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48f28aeccf369df5980ac787e9e313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063733c42dabe6ad141af09595e5cc92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c632976c22403be7dfeab05a8514ea04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2021-02-06更新
|
236次组卷
|
2卷引用:河南省豫南九校2020-2021学年高二上学期期末联考理数试题
4 . 直线
与抛物线
交于两不同点
,
.其中
,
,若
,则直线
恒过点的坐标是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.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/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1f8e366038f2a7ddb0a117c5e88c10c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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