解题方法
1 . 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.
您最近一年使用:0次
2022高三·全国·专题练习
解题方法
2 . 已知曲线
与直线
交于两点
和
,且
.记曲线
在点
和点
之间那一段
与线段
所围成的平面区域(含边界)为
.设点
是
上的任一点,且点
与点
和点
均不重合.
(1)若点
是线段
的中点,试求线段
的中点
的轨迹方程;
(2)若曲线
与
有公共点,试求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c190e3498ab082d575c24a1a66b6da0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3497af3942a788b64c6b91b62a8dbf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4564dc28307341aea4003be38c19dfdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfc04d299bab9f4acc3a856854ceb77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e98a91449567701651a61518a24b233.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37254351125380127823c0fd7d95458d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/359432753680f1834e65be52adce209f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解题方法
3 . 已知
是抛物线
上一点,
是
轴上的点,以
为圆心且过点
的圆与
轴分别交于点
、
,且当圆
与
轴相切时,
到抛物线焦点的距离为
.
(1)求抛物线
的标准方程;
(2)设线段
、
长度分别为
、
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](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/0b63701f7015f74774ba913c41346e00.png)
您最近一年使用:0次
解题方法
4 . 已知抛物线
的焦点为F,P为C上一点,点
,
,设
取最小值和最大值时对应的点分别为
,
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf76033463e0dd2fb01f3c058a8c681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241ce9bd28046ce9b90f43b391132884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5c320d78ef38e330176c335cc58e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9cc98e6df306063e645044f0faa7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28d760b56950131b77784adf6845fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
A.4 | B.3 | C.2 | D.1 |
您最近一年使用:0次
2022-01-03更新
|
3174次组卷
|
3卷引用:专题10 解析几何1