1 . 已知抛物线
上一点
到焦点F的距离
,倾斜角为α的直线经过焦点F,且与抛物线交于两点A、B.
(1)求抛物线的标准方程及准线方程;
(2)若α为锐角,作线段AB的中垂线m交x轴于点P.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6eda0d8732b07b06693bde233fb208c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3294a1b0769d2936880580b991b870a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90e4d97e31ea11615f23e53c285b319.png)
(1)求抛物线的标准方程及准线方程;
(2)若α为锐角,作线段AB的中垂线m交x轴于点P.证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da3a52a11565502a8d918d493604f425.png)
您最近一年使用:0次
2 . 已知抛物线
上一点
到焦点
的距离
,倾斜角为
的直线经过焦点
,且与抛物线交于两点
、
.
(1)求抛物线的标准方程及准线方程;
(2)若
为锐角,作线段
的中垂线
交
轴于点
.证明:
为定值,并求出该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ddd8188218c214b934c35564f87673c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e9e89f5ece16db5cf7c5f4fdc56ec1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/671b66ae9432d2220c49e5d1da9a6984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.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/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求抛物线的标准方程及准线方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.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/285a703081e781113a77f3b221011a72.png)
您最近一年使用:0次
2019-09-13更新
|
940次组卷
|
4卷引用:【全国市级联考 】四川省内江市2018-2019学年高二下学期期末检测数学(理)试题
3 . 已知拋物线C:
经过点
,其焦点为F,M为抛物线上除了原点外的任一点,过M的直线l与x轴、y轴分别交于A,B两点.
Ⅰ
求抛物线C的方程以及焦点坐标;
Ⅱ
若
与
的面积相等,证明直线l与抛物线C相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940349e98dc700cb6e196879c1a5ad72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e15e83c607c1c733d34df1f52e40d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8858a6a17aab0404023a9fa2ae9a5e3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afac6934256a23613443c393446881a4.png)
您最近一年使用:0次
2019-04-16更新
|
826次组卷
|
4卷引用:【市级联考】新疆乌鲁木齐2019届高三第二次质量检测文科数学试题
【市级联考】新疆乌鲁木齐2019届高三第二次质量检测文科数学试题【市级联考】新疆乌鲁木齐地区2019届高三第二次质量监测数学(理)试题2019届新疆乌鲁木齐地区高三第二次质量监测数学(文)试题(已下线)湖南省株洲市2023届高三下学期一模数学试题变式题17-22