1 . 设过抛物线
对称轴上的定点
,作直线
与抛物线交于
两点,且
,相应于点
的直线
称为抛物线的“类准线”.
(1)若
,求
的值;
(2)若点
是“类准线”
上任意一点,设直线
(其斜率都存在)的倾斜角依次为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fa4061a149f863b7ac4dd939f34ffc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac991b1781da9df3cb4e7f1524c05032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/709887c8b7a179f0015b361b4979b939.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9ca217fc5968a9b582b6cd8e898312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c19fd0c317b0fd48e8ea57a6e793693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ba63ad02b1d5af2982fac3d91eb15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44dbccbec6f1edfb1f82ecb7f148812.png)
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2 . 已知抛物线C:
的焦点为F,斜率为1的直线l经过F,且与抛物线C交于A,B两点,
.
(1)求抛物线C的方程;
(2)过抛物线C上一点
作两条互相垂直的直线与抛物线C相交于
两点(异于点P),证明:直线
恒过定点,并求出该定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ed9d97b8745ed1c15349ea3fffc299.png)
(1)求抛物线C的方程;
(2)过抛物线C上一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d02aa702406987fbeb90f0ab7ea1f8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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2023-03-03更新
|
556次组卷
|
4卷引用:安徽省蚌埠市铁路中学2023-2024学年高二上学期期中检测数学试题
安徽省蚌埠市铁路中学2023-2024学年高二上学期期中检测数学试题江苏省泰州市靖江高级中学2022-2023学年高二下学期第一次调研测试数学试题(已下线)重难专攻(十)圆锥曲线中的定点问题 讲(已下线)重难点突破08 圆锥曲线的垂直弦问题 (八大题型)
名校
3 . 已知F为抛物线
的焦点,由直线
上的动点P作抛物线的切线,切点分别是A,B,则
与
(
为坐标原点)的面积之和的最小值是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d0aa9412dd7caf42cc71520e282328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa0505b8c375d6bdbc66d16e10c527e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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2023-02-06更新
|
1196次组卷
|
6卷引用:安徽省安庆市第二中学2022-2023学年高三下学期第七次质量检测数学试题
名校
解题方法
4 . 已知O为坐标原点,点F为抛物线
的焦点,点
,直线
:
交抛物线C于A,B两点(不与P点重合),则以下说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cfb23a9e07213cb76990dbedfc7feca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303094682b317daea83be885d1c7ff4b.png)
A.![]() | B.存在实数![]() ![]() |
C.若![]() ![]() | D.若直线PA与PB的倾斜角互补,则![]() |
您最近一年使用:0次
2023-02-03更新
|
915次组卷
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9卷引用:安徽省名校联盟2023届高三下学期开学模拟考试数学试题
5 . 如图,直线
与抛物线
交于
两点,与
相交于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/cbf76df4-29b4-4bdd-a0a4-aafd20b27edc.png?resizew=129)
(1)求证:
点的坐标为
;
(2)求证:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e8953ded144195804384dcb494d5e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81cd92f36a8b808d78169e0ed8f6ee0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d681a7a9830fe11598654e141aa28e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/cbf76df4-29b4-4bdd-a0a4-aafd20b27edc.png?resizew=129)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
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名校
解题方法
6 . 已知抛物线 E 的焦点为 F,顶点为O,过F作两条互相垂直的直线
,它们分别与E相交于A、B和C、D,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
A.∠AOB为锐角 | B.∠COD为钝角 |
C.![]() | D.![]() |
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2023-01-14更新
|
364次组卷
|
2卷引用:安徽省阜阳市临泉第一中学2022-2023学年高三上学期1月期末理科数学试题
7 . 已知抛物线
:
的焦点为
,过焦点
的直线
与抛物线交于
,
两点,当直线
的倾斜角为
时,
.
(1)求抛物线
的方程;
(2)求证:过焦点
且垂直于
的直线与以
为直径的圆的交点分别在定直线上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311c73f960fc4b8f21402057d6150f50.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求证:过焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2023-01-13更新
|
276次组卷
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3卷引用:安徽省芜湖市2022-2023学年高三上学期期末数学试题
解题方法
8 . 设抛物线
的焦点为F,直线l过F且与抛物线交于A、B两点,若
,则直线l的方程为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88eec86c17ca9025e2a6c7db421f5c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/609ade7633b9b03768ad9174b50c8742.png)
您最近一年使用:0次
名校
解题方法
9 . 足球、篮球、排球、乒乓球都是同学们喜欢的运动项目,球在运动中的某一过程形成的轨迹就是抛物线,2022年卡塔尔世界杯足球赛中,C罗抛物线跑位更是惊艳全场.已知抛物线
,过点
的直线交抛物线于点M,N,交y轴于点P,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab965b1d5b0f2db7c5b9fd0296360ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d95811ca4be184d47a232fb3b93fd76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96724b211bf3e56d588bd430aa3f2894.png)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-01-13更新
|
327次组卷
|
3卷引用:安徽省合肥市肥东县综合高中2022-2023学年高二上学期期末数学试题
名校
10 . 在平面直角坐标系
中,已知抛物线C:
(
)与直线
:
(
)相交于A,B两点.
(1)若以AB为直径的圆过原点,证明:
;
(2)若线段AB中点的横坐标为4,且抛物线C的焦点到直线
的距离为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abd313d4e92a762fb7fb0c1cb65263d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a83b09a1354eb807e38528466ab1bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
(1)若以AB为直径的圆过原点,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/123a24ff7e7d1b37e6acb6e950ad6f81.png)
(2)若线段AB中点的横坐标为4,且抛物线C的焦点到直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b3951ff1b8cfd74668a467fab41db1.png)
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