解题方法
1 . 如图,已知点P在直线l:
上,A,B为抛物线C:
上任意两点,PA,PB均与抛物线C相切,直线AB与直线l交于点Q,过抛物线C的焦点F作AB的垂线交直线l于点K.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/e16b222d-fa45-4d97-8606-4ed702185d57.png?resizew=224)
(1)若点A到F的距离比到直线l的距离小1,求抛物线C的方程;
(2)在(1)的条件下,当
最小时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/e16b222d-fa45-4d97-8606-4ed702185d57.png?resizew=224)
(1)若点A到F的距离比到直线l的距离小1,求抛物线C的方程;
(2)在(1)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc6d22a856a7378063b277eb9d33b2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eedd1e9f48169405a92eef2668a878e.png)
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2 . 已知动点
到点
的距离与到
轴的距离的差为2.
(1)求动点
的轨迹方程;
(2)若过点
的直线
与动点
的轨迹交于
两点,直线
与
轴交于点
,过
作直线
的垂线,垂足分别为
,若
(S表示面积),求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa080648224385147faca0e4a0aace8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be92f0e0012a7696c78e3e00513edefd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若过点
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16047919b339fe722439500dd0dc276e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
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3 . 如图,已知抛物线
上有一动点
,M为y轴上的动点,设
,连接
与
交于点B,过B作
的切线交
的延长线于点H,连接
交C于点E,连接
交y轴于点G,分别记
的面积为
.
![](https://img.xkw.com/dksih/QBM/2022/5/15/2979791034212352/2979995582226432/STEM/2a759791-3864-4501-af6a-c5c64da8aace.png?resizew=273)
(1)若
,求p;
(2)若
,求证:
是
之间的一个定值(不必求出定值).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633ad134a0b478865331a4d50765ea39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecfb2a536197b222df8b10a4c453f05f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dca26e29d00ff4ce2345d77e7d8f07b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83042953e7f15e984b2da2ee9ca678d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a1d4c4b3c645336020f25debd656c1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3637753af5ce86be9c23a9beb6b5067.png)
![](https://img.xkw.com/dksih/QBM/2022/5/15/2979791034212352/2979995582226432/STEM/2a759791-3864-4501-af6a-c5c64da8aace.png?resizew=273)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbb711b435935e64e1242f5b0de039d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18a46d75a74e148cb708d400f018875c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf277d377c0f1ad6e23b8a7ed0da6c4.png)
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21-22高二·全国·课后作业
4 . 如图,动圆P过定点A,且与定直线
相切,请指出圆心P的轨迹是什么,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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2022-03-05更新
|
435次组卷
|
4卷引用:3.1 抛物线及其标准方程
(已下线)3.1 抛物线及其标准方程(已下线)模块一 专题13 圆锥曲线的方程3北师大版(2019)选择性必修第一册课本习题第二章3.1 抛物线及其标准方程北师大版(2019)选择性必修第一册课本例题3.1 抛物线及其标准方程
5 . 焦点为
的抛物线
与圆
交于
两点,其中
点横坐标为
,方程
的曲线记为
,
是曲线
上一动点.
在抛物线上且满足
,求直线
的斜率;
(2)
是
轴上一定点. 若动点
在
上满足
的范围内运动时,
恒成立,求
的取值范围;
(3)
是曲线
上另一动点,且满足
,若
的面积为4 ,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8a3bffe545af2299cf999d44767206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd64825e3ff912ad3cae60e6b6dca488.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e4e4c7a79d9d3cdb9ac5949d53e33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c97938d07092ac2803ff89a47e5b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcec04cff66ddf1c021d73d6c681ebb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360d86f0ec1c4d9d0dfc06a9064db0b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/388f9a492789afe93cd09bced064e06e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff8450b7dd0330a9686594a14baa9f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0b68e4289ee07e6a7d1dbea801aecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a52c17a41524894bb6932b11181e6e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e29303195c563855aee4c14cbcb9bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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2021-05-05更新
|
708次组卷
|
7卷引用:上海市杨浦区2021届高三二模数学试题
上海市杨浦区2021届高三二模数学试题(已下线)押第20题 解析几何-备战2021年高考数学(文)临考题号押题(全国卷1)(已下线)押第20题 解析几何-备战2021年高考数学(理)临考题号押题(全国卷1)上海市嘉定区第二中学2022届高三下学期开学考试数学试题江西省宜春市丰城市第九中学2022-2023学年高二重点班(28、29班)上学期期末考试数学试题(已下线)压轴题圆锥曲线新定义题(九省联考第19题模式)练(已下线)江苏省南通市2024届高三第二次调研测试数学试题变式题 16-19
名校
解题方法
6 . 材料:对抛物线
,定义:点
叫做该抛物线的焦点,直线
叫做该抛物线的准线,且该抛物线上任意一点到焦点的距离与它到准线的距离相等.运用上述材料解决如下问题:
如图,已知抛物线
的图象与
轴交于
两点,且过点
,
的解析式和点A的坐标;
(2)若将抛物线
的图象向左平移2个单位,再向上平移1个单位得抛物线
的图象.
①设
为抛物线
位于第一象限内图象上的任意一点,
轴于点
,求
的最小值;
②若过抛物线
的焦点
作直线
,与抛物线
交于
两点,再过
两点分别作抛物线的切线,两条切线交于点
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa0e961df94bc4cc1c8407ed65f2557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a415f2567685ccf84257ac443f779a5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423f5e7781b94f96ff4aac23cba2964d.png)
如图,已知抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f61d802cc79e61fc37a79d4bae4e98c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9cda46e575acf64941ea0964b89ee99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980240503eeea96e431bb5540ba60879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52cbeb9b1c1d637b903cf3e5c7f730f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f25f0610430d94cc16ca340e3ac5757.png)
②若过抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.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/44091f07aab1b00f3c5abb14d98fed25.png)
您最近一年使用:0次
7 . 已知点
在抛物线E:
上.有下列三个条件:
①点P到抛物线E的焦点F的距离为4;
②点
,记E上动点B到直线
的距离为d,且
的最小值为
;
③点P到
的距离比点P到y轴距离大2.
请选择其中一个条件解答下列问题:
(1)求p与t的值;
(2)直线l与抛物线E交于M,N两点,记直线PM的斜率为
,直线PN的斜率为
,当
时,直线l是否过定点?若是,求出定点坐标;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b661b498c2f3f885c3587abb1d42f789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
①点P到抛物线E的焦点F的距离为4;
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7d9eb9a891a713b7893af452302d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b64b91d079810d968b9ef63e3284c7af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32277ebb1433f36f0e696965805b614d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2d52429c8324350309f77e7209a5c35.png)
③点P到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4356a596535d4e905ae47e191940f34f.png)
请选择其中一个条件解答下列问题:
(1)求p与t的值;
(2)直线l与抛物线E交于M,N两点,记直线PM的斜率为
![](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/c2b1bd378406bcd8156a56469f9300f6.png)
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8 . 已知圆
,圆心
到抛物线
的准线的距离为
,圆
截直线
所得弦长为
.
(1)求圆
的方程.
(2)若
、
分别为圆
与抛物线
上的点,求
、
两点间距离的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc34960e98fbdedb9270e1e6cd96852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950bd3bb1891b526b5fea4a0e7501dde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7163395f9aaa29be7f6b3106ba48b744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216007076ff106927f4498f10b39d8d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
9 . 如图,已知抛物线
,过x轴正半轴上一点P的两条直线分别交抛物线于A、C和B、D两点,且A,D在第一象限,直线AB与x轴的交点E在原点O和P点之间.
![](https://img.xkw.com/dksih/QBM/2021/5/24/2728181166555136/2733419083440128/STEM/a091f884-311e-4ab7-89b9-a75d31d9d2f2.png?resizew=125)
(1)若P为抛物线的焦点,且
,求点A的坐标;
(2)若P为动点,且
的面积是
面积的3倍,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://img.xkw.com/dksih/QBM/2021/5/24/2728181166555136/2733419083440128/STEM/a091f884-311e-4ab7-89b9-a75d31d9d2f2.png?resizew=125)
(1)若P为抛物线的焦点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ad9fff96ce826e3d4196d50bced153.png)
(2)若P为动点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96645a3530e72d5d733d2c72147d340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a999c96761e5d293c0c3314e52a1c8b0.png)
您最近一年使用:0次
解题方法
10 . 已知点
到直线
的距离等于
,其中
.设平面内与点F和直线
距离相等的点的轨迹为C.
(1)求C的方程;
(2)设
与C在第一象限的交点为A,
与x轴的交点为B,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f6d06b9a4d3a891ea7c986b1ab4e925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c7c90d155f309e54303f68d91a6b5d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18a4c25fa7b7754fc55548e2497a9d6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0bae54510610d3118cc785489001096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc3624ac3279fa0d23e45c6259f1864.png)
(1)求C的方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
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2022-12-26更新
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2卷引用:四川省2022年普通高等学校高职教育单独招生文化考试(普高类)数学试题