1 . 已知抛物线的顶点是椭圆
的中心,焦点与该椭圆的右焦点重合.
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)已知动直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9065d65bdaef4398ce0da64de6d5677b.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a0987f6e9131651f3e50fcd1647a33.png)
(3)是否存在垂直于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2 . 已知椭圆
的左、右焦点分别为
,点
为椭圆
上两点.
(1)若直线
过左焦点
,求
的周长;
(2)若直线
过点
,求
的取值范围;.
(3)若点
是椭圆
与抛物线
在第一象限的交点.是否存在点
,使得线段
的中点
在拋物线
上?若存在,求出所有满足条件的点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f036026cd92e9ad059c3f22a7658638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdce3deea7dc84d1a2119a34863b36ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5eb2485f90dbfd0dfd6e7d179a856f5.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f449cadb49859b80c31ef1f68bfe81b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1ae37530007d72ccab3c15ffbe4de0.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12769b05875896568efa75bddf287bf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
您最近一年使用:0次
2023-01-03更新
|
550次组卷
|
4卷引用:河北省秦皇岛市青龙满族自治县实验中学2022-2023学年高二下学期开学考试数学试题
3 . 已知抛物线
的焦点F到准线的距离为2.
(1)求C的方程.
(2)已知O为坐标原点,直线l与抛物线C交于A,B两点,且
,D为直线l上一点,且
,证明:存在定点Q,使得
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
(1)求C的方程.
(2)已知O为坐标原点,直线l与抛物线C交于A,B两点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ef54adb0b01f212dd43fcea5913ce72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b33693ae164d2f57bd15664016f8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4110cc2b5dc3aabd585a8e9a81855a12.png)
您最近一年使用:0次
名校
4 . 已知抛物线C:
经过点
.
求抛物线C的方程;
若A,B为抛物线C上不同的两点,且AB的中点坐标为
,求直线AB的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/642bade9e30b7a60c2b3b7d48d87d4f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7fc5ca2b374fbd3a69102e0284983e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a1f3420079628d3636d7f14d7707a0e.png)
您最近一年使用:0次
2019-03-14更新
|
364次组卷
|
3卷引用:河北省沧州市第一中学2020-2021学年高二下学期开学考试数学试题