名校
1 . 已知抛物线
的焦点是
,准线是
.
(Ⅰ)写出
的坐标和
的方程;
(Ⅱ)已知点
,若过
的直线交抛物线
于不同的两点
,
(均与
不重合),直线
,
分别交
于点
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(Ⅰ)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(Ⅱ)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ac1f4eb5e6145cc1b4241065218f50.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0451f9e4f4db57e9ae978cdc27325698.png)
您最近一年使用:0次
2 . 已知抛物线:
的焦点F在直线
上,抛物线与直线
交于A,B两点,
,
的延长线与抛物线交于C,D两点.
(Ⅰ)求抛物线的方程;
(Ⅱ)求证:直线
恒过一定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f662f54b1c626d48849057527cf0f08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(Ⅰ)求抛物线的方程;
(Ⅱ)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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解题方法
3 . 如图,已知抛物线
的焦点为
,
为坐标原点,直线
与抛物线
相交于
,
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/90454f7c-9f4b-4b20-961e-97b23c25ba88.png?resizew=130)
(1)当
,
时,求证:
;
(2)若
,点
关于直线
的对称点为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa2c731aaa4005382d5b4324e29fbb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f24e616b5a35ff372c78c1472f156ab.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://img.xkw.com/dksih/QBM/editorImg/2022/11/5/90454f7c-9f4b-4b20-961e-97b23c25ba88.png?resizew=130)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f06408895febc126c2ae409e807349c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f20bf927d76ca5c9679922cc89f489.png)
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解题方法
4 . 如图,已知抛物线
与
轴相交于点
,
两点,
是该抛物线上位于第一象限内的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/4c951471-66ed-4130-9e67-ba6e6422d5c7.png?resizew=190)
(Ⅰ) 记直线
的斜率分别为
,求证:
为定值;
(Ⅱ)过点
作
,垂足为
.若
关于
轴的对称点恰好在直线
上,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40c184c17e35b98fe8094cebe9522e1c.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/4c951471-66ed-4130-9e67-ba6e6422d5c7.png?resizew=190)
(Ⅰ) 记直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180e70ec47e578366cca62df61290460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29212e455dd6df5379ae67f379a32158.png)
(Ⅱ)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
您最近一年使用:0次
5 . 已知抛物线C:
,焦点为
,点
在抛物线C上,设
,其中
.
(Ⅰ)求焦点
的坐标;
(Ⅱ)求证:直线
与抛物线C相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00783bc22702fa2e24b3f4a259fe6ed1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b8e0e181de2dfa47561cc534287eed.png)
(Ⅰ)求焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(Ⅱ)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
2020高三·江苏·专题练习
6 . 已知椭圆E:
+
=1(a>b>0)的离心率为
,焦点到相应准线的距离为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/391632be-5af3-4ef3-a312-e146bb15b6b8.png?resizew=186)
(1) 求椭圆E的标准方程;
(2) 已知P(t,0)为椭圆E外一动点,过点P分别作直线l1和l2,直线l1和l2分别交椭圆E于点A,B和点C,D,且l1和l2的斜率分别为定值k1和k2,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7355be4fcbc3130a5951364a3be76d6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5268413295580cfda0755ab458b36b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/391632be-5af3-4ef3-a312-e146bb15b6b8.png?resizew=186)
(1) 求椭圆E的标准方程;
(2) 已知P(t,0)为椭圆E外一动点,过点P分别作直线l1和l2,直线l1和l2分别交椭圆E于点A,B和点C,D,且l1和l2的斜率分别为定值k1和k2,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2efd9f1d286d417d5596e4fa2b52a4.png)
您最近一年使用:0次
名校
7 . 已知抛物线C;
过点
.
求抛物线C的方程;
过点
的直线与抛物线C交于M,N两个不同的点
均与点A不重合
,设直线AM,AN的斜率分别为
,
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/642bade9e30b7a60c2b3b7d48d87d4f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/222ed48baf754fd0f7b8191e5becb98f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/dc205698-c912-4336-a736-b0fe2c628563.png?resizew=161)
![](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/10275d27800131506913cd74c34eb66f.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/9f375dc5addedc5f9fbb72d566939c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731f980ccb6f902d460d0ea2920bfe2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02248bfd4daed0e93455fc898b2666b2.png)
您最近一年使用:0次
2018-11-16更新
|
9821次组卷
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26卷引用:浙江省2017年4月普通高中学业水平考试数学试题
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