1 . 已知
,B在圆
上运动,过
的中点M向y轴引垂线,垂足为N,且
,设
,点P的轨迹为曲线
.
(1)求曲线
的方程,并证明直线
与
的斜率之积为定值;
(2)设E,F是曲线
上的不同两点,O为坐标原点,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40630a669f4eedf626bc24851df10c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f8ebed1c19f199dc9165162dc5d3f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f3da46e58716b14ac1f8eb493fb9667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531b86323f50ea2b30aa5e033d1d396c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(2)设E,F是曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6eb55ed7f3fff3660eecdbe5ab87a6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc869125145c0139d92490a41bd3918.png)
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2 . 如图所示,过原点O作两条互相垂直的线OA,OB分别交抛物线
于A,B两点,连接AB,交y轴于点P.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/e8f02597-2cc6-4180-9c64-2c490bc45fc3.png?resizew=158)
(1)求点P的坐标;
(2)证明:存在相异于点P的定点T,使得
恒成立,请求出点T的坐标,并求出
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f4123c19136d3a4dc040dce8e34e14.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/e8f02597-2cc6-4180-9c64-2c490bc45fc3.png?resizew=158)
(1)求点P的坐标;
(2)证明:存在相异于点P的定点T,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a725613972cca1d387bbfb6d3426f1f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a04e30d5827f2120d997997e4e31ba17.png)
您最近一年使用:0次
2023-02-22更新
|
782次组卷
|
2卷引用:北京市清华大学THUSSAT2023届高三上学期12月诊断性测试数学(理)试题
3 . 已知抛物线
,过点
的动直线与
交于点
,且
为定值.
(1)求
的方程![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
(2)若抛物线
在点
处的切线交于点
,求证:
①点
在定直线上![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
②若
为
的焦点,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c70ed42299c41bda5350dd3f026f523.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea666869a508a9caa58c89903f811261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6f48b9a53c0155a692509cf31f7e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0dd672a03d24aa460b60a29bc685641.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
(2)若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6f48b9a53c0155a692509cf31f7e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/888c3a298b0804b4272b23c4ff6e8f9d.png)
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名校
4 . 在平面直角坐标系中,抛物线
与
轴分别相交于
两点(点
在点
的左侧),与
轴相交于点
,设抛物线
的对称轴与
轴相交于点
,且
.
(1)求
的值;
(2)将抛物线
向上平移3个单位,得到抛物线
,设点
是抛物线
上在第一象限内不同的两点,射线
分别交直线
于点
,设
的横坐标分别为
,且
,求证:直线
经过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850052d1b76efcb72b6dd236405b2158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ebaa32f4f1f4f807ca9aeb7fb29951.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07b3571ce1b8bb4e41285b668a279ce.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9f5f4ad0caac5a0fecb64f3908d2290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ab53bfd448dd63a52a710900cf474e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd24f3c4bc9f9a75d4b28630bb630d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/584aa3ab6160d92286cff2dc6a6c0ed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/584aa3ab6160d92286cff2dc6a6c0ed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60e81e3046baebc75ff78f7e2a76015b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42a0cb8e361b1e0bbccfdfa8950f0bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
您最近一年使用:0次
2022高三·全国·专题练习
5 . 已知抛物线y2=x上的动点M(x0,y0),过M分别作两条直线交抛物线于P、Q两点,交直线x=t于A、B两点.
(1)若点M纵坐标为
,求M与焦点的距离;
(2)若t=﹣1,P(1,1),Q(1,﹣1),求证:yAyB为常数;
(3)是否存在t,使得yAyB=1且yPyQ为常数?若存在,求出t的所有可能值,若不存在,请说明理由.
(1)若点M纵坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(2)若t=﹣1,P(1,1),Q(1,﹣1),求证:yAyB为常数;
(3)是否存在t,使得yAyB=1且yPyQ为常数?若存在,求出t的所有可能值,若不存在,请说明理由.
您最近一年使用:0次
解题方法
6 . 在平面直角坐标系xOy中,已知抛物线M:
.P,Q,R为M上相异的三点,且
,
与
负半轴交于点A,RQ,PQ分别与
正半轴交于点B,C,记点
.
(1)证明:
;
(2)若B为M的焦点,当
最大时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1167767fd847678ef279f3e637f2828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42af8cdea9c5269c17aebb086afdd136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b79ca81f286d8aeed52f91ee13ce0d8.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69613c5de7597bdd2785f6da36a89c81.png)
(2)若B为M的焦点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316455c9e6cf663f17adef935014cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/015740ce0b7022cf0a5503747c020999.png)
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解题方法
7 . 已知抛物线
,焦点为
,过
作动直线
交抛物线
于
两点
,过
作抛物线
的切线
,过
作直线
的平行直线
交
轴于
,设线段
的垂直平分线为
,直线
的倾斜角为
.已知当
时,
.
(1)求抛物线
的方程;
(2)证明:直线
过
轴上一定点,并求该定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ea1be9b9b6bb12afa7e1ce703d1603.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4daf40bad1cc89311930cce356672354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb31cb079c66cb83d4ef0a3310f8662.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/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f331c3d96c5812a620e326373747eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2913f8d730167b2bc9bbbbf809de4b1a.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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解题方法
8 . 已知点F是抛物线
的焦点,动点P在抛物线上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/15/7e5a3835-f91e-40a8-aad4-47d71b82d280.png?resizew=238)
(1)写出抛物线的焦点坐标和准线方程;
(2)设点
,求
的最小值:
(3)设直线l与抛物线交于D,E两点,若抛物线上存在点P,使得四边形DPEF为平行四边形,证明:直线l过定点,并求出这个定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/15/7e5a3835-f91e-40a8-aad4-47d71b82d280.png?resizew=238)
(1)写出抛物线的焦点坐标和准线方程;
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46bcccb43d2bb69df350bc72cf8d6243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8769fe40da8b05f4fff38fa041cb60.png)
(3)设直线l与抛物线交于D,E两点,若抛物线上存在点P,使得四边形DPEF为平行四边形,证明:直线l过定点,并求出这个定点的坐标.
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名校
解题方法
9 . 一种卫星接收天线如图1所示,其曲面与轴截面的交线为抛物线.卫星发射的信号波束到达后,在轴截面内呈近似平行状态射入,经反射聚集到焦点处,从而位于焦点处的信号接收器可以接受到较强的信号波.已知接收天线的口径(直径)为4米,深度为1米.根据图2中的坐标系,解答下列问题:
![](https://img.xkw.com/dksih/QBM/2022/3/10/2933292230918144/2948224848240640/STEM/e3712024-5cf9-43fc-93c5-e9ac525184da.png?resizew=296)
(1)求接收器与顶点间的距离;
(2)证明一卫星信号波沿着平行于对称轴方向射入,经过抛物线上的点M(不同于抛物线顶点)反射后经过焦点F.
![](https://img.xkw.com/dksih/QBM/2022/3/10/2933292230918144/2948224848240640/STEM/e3712024-5cf9-43fc-93c5-e9ac525184da.png?resizew=296)
(1)求接收器与顶点间的距离;
(2)证明一卫星信号波沿着平行于对称轴方向射入,经过抛物线上的点M(不同于抛物线顶点)反射后经过焦点F.
您最近一年使用:0次
2022-03-31更新
|
220次组卷
|
2卷引用:江苏省苏州市昆山市七校2021-2022学年高二上学期12月联考数学试题
名校
解题方法
10 . 已知直线
与曲线
的两个公共点之间的距离为
.
(1)求C的方程.
(2)设P为C的准线上一点,过P作C的两条切线,切点为A,B,直线
的斜率分别为
,
,且直线
与y轴分别交于M,N两点,直线
的斜率为
.证明:
为定值,且
成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9355031ea0b2dc9cef3777621bc6d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e1238ecbd621b0611e5bd5fc7eb5ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee05b3210c8964deef8ff771173d288.png)
(1)求C的方程.
(2)设P为C的准线上一点,过P作C的两条切线,切点为A,B,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed1e9cdd5a82f29ec89b2c53b4fa6f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b916d1dcf37d56ae470b16c0aa752ce3.png)
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2022-03-09更新
|
1287次组卷
|
7卷引用:河南省名校联盟2021-2022学年高三下学期3月大联考理科数学试题
河南省名校联盟2021-2022学年高三下学期3月大联考理科数学试题河南省名校联盟2021-2022学年高三下学期3月大联考文科数学试题河北省部分名校(唐县第一中学等)2022届高三下学期3月联考数学试题广东省2022届高三下学期3月大联考数学试题贵州省黔东南州2022届高三一模考试数学(理)试题(已下线)专题28 圆锥曲线中的定值定点问题- 2022届高考数学一模试题分类汇编(新高考卷)福建省泉州第五中学2023届高三毕业班高考适应性检测(二)数学试题