解题方法
1 . 已知抛物线:
,焦点为F,
为
上的一个动点,
是
在点A处的切线,点P在
上且与点A不重合.直线PF与Γ交于B、C两点,且
平分直线AB和直线AC的夹角.
(1)求
的方程(用
表示);
(2)若从点F发出的光线经过点A反射,证明:反射光线平行于x轴;
(3)若点A坐标为
,求点P坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f32e577ae1f4449efbd64c1199efe7a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23cb0c85ef0ac4d8722bba9fde0a851c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8750c7a9d012d136a878dc8f4233dfb7.png)
(2)若从点F发出的光线经过点A反射,证明:反射光线平行于x轴;
(3)若点A坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76678d7fed19144e94bb7c0bd6dba6d9.png)
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2 . 已知抛物线
,则焦准距是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2633530c5ec2938687ba295a6379d9.png)
A.1 | B.2 | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
3 . 已知曲线
和
,点
分别在曲线
上,记点Q的横坐标为
,则
的最小值是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bba249c8c70279fc4437eb07d19c7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c7fc8e284e4aafd93a630d50a53930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9feabc99f62ee569b460e61526e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c15a90db6dfd1aab79a3728748cc6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/916c9412531632a32a3d8afcbdcdd516.png)
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2024-03-03更新
|
164次组卷
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2卷引用:浙江省丽水市2023-2024学年高二上学期1月期末教学质量监控数学试题
4 . 法国天文学家乔凡尼·多美尼卡·卡西尼在研究土星及其卫星的运动规律时,发现了平面内到两个定点的距离之积为常数的点的轨迹,并称为卡西尼卵形线(CassiniOval)小张同学受到启发,提出类似疑问,若平面内动点与两定点所成向量的数量积为定值,则动点的轨迹是什么呢?设定点
和
,动点为
,若
,则动点
的轨迹为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca42c663d6bb81f359548588c8fd1cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
A.直线 | B.圆 | C.椭圆 | D.抛物线 |
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解题方法
5 . 已知抛物线
的焦点为
,准线为
,点
,
在
上(
在第一象限),点
在
上,
,
,( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa2c731aaa4005382d5b4324e29fbb0.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c9b457e3c07be3cc5b1901cc0821f47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37edfa50ca7b7900ed58b813954cecf2.png)
A.若![]() ![]() | B.若![]() ![]() |
C.则![]() ![]() | D.则![]() ![]() |
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5卷引用:浙江省金华市2023-2024学年高三上学期2月期末考试数学试题
浙江省金华市2023-2024学年高三上学期2月期末考试数学试题(已下线)第六套 九省联考全真模拟湖南省2024届高三数学新改革提高训练五(九省联考题型)(已下线)压轴小题2 平面几何中的双动点问题(4月)(已下线)压轴小题7 抛物线性质的综合问题
解题方法
6 . 已知抛物线
:
的焦点为
,点
为抛物线
上一动点,点
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2eaabc3705116778c73c8799890b6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e648aa381d4c1ee6639536b0b1510a.png)
![](https://img.xkw.com/dksih/QBM/2024/1/29/3421479302193152/3432014929436672/STEM/01949a8ed7024ab299f550c785202fed.png?resizew=4)
A.抛物线![]() ![]() |
B.![]() |
C.当![]() ![]() ![]() ![]() |
D.过![]() ![]() ![]() ![]() |
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解题方法
7 . 抛物线
的焦点为
,准线为
,点
为抛物线上一点,满足
(
为坐标原点),
,垂足为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1f58cb53e4f4d3cb053785d53fbb2a3.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c26c84ee017deda59151ac60f21ac23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c97d2110db5fc9cd9971a63cadcf87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ddf9f494bfe841e59ee09487a0cc59a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1f58cb53e4f4d3cb053785d53fbb2a3.png)
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8 . 已知抛物线
的焦点为
,经过点
的直线
与
交于
两点,且抛物线
在
两点处的切线交于点
,
为
的中点,直线
交
于点
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb7b76d897de678faaf8221bafe217d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85d23fc512ad69a2d5919ce690407704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
A.点![]() ![]() | B.![]() ![]() |
C.![]() | D.![]() |
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|
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2卷引用:浙江省嘉兴市第一中学2024届高三第一次模拟测试数学试题
9 . 已知抛物线
的焦点为
,准线
与
轴交于点
,过
的直线
与抛物线
相交于
两点,点
是点
关于
轴的对称点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2023-12-21更新
|
328次组卷
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4卷引用:浙江省金华市卓越联盟2023-2024学年高二上学期12月阶段联考数学试卷
10 . 如图,过焦点
的直线与抛物线
交于
,
两点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/78f34573-a3fd-4c77-8215-71a96ff4e141.png?resizew=148)
A.![]() | B.![]() |
C.以弦![]() | D.![]() ![]() ![]() |
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