1 . 已知抛物线
.
(Ⅰ)写出抛物线C的准线方程,并求抛物线C的焦点到准线的距离;
(Ⅱ)过点
且斜率存在的直线l与抛物线C交于不同的两点A,B,且点B关于x轴的对称点为D,直线AD与x轴交于点M.
(i)求点M的坐标;
(ⅱ)求
与
面积之和的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa2c731aaa4005382d5b4324e29fbb0.png)
(Ⅰ)写出抛物线C的准线方程,并求抛物线C的焦点到准线的距离;
(Ⅱ)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
(i)求点M的坐标;
(ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0edafce95aade0386bc0d78f679dcf47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
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解题方法
2 . 已知抛物线C:
=2px过点M(2,2),A,B是抛物线C上不同两点,且AB∥OM(其中O是坐标原点),直线AO与BM交于点P,线段AB的中点为Q
(1)求抛物线C的准线方程;
(2)求证:直线PQ与x轴平行.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dabd4b43826f82e192d646c895dfa6c6.png)
(1)求抛物线C的准线方程;
(2)求证:直线PQ与x轴平行.
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2020-02-15更新
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529次组卷
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4卷引用:【全国百强校】北京市人大附中2019届高三高考信息卷(三)理科数学试题
名校
3 . 已知抛物线
过点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1adfb019c33df092f35e2a9678c69c9.png)
(Ⅰ)求抛物线的方程和焦点坐标;
(Ⅱ)过点
的直线
与抛物线交于两点
,点
关于
轴的对称点为
,试判断直线
是否过定点,并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8516f71467b419293fa27df70bdaed74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1adfb019c33df092f35e2a9678c69c9.png)
(Ⅰ)求抛物线的方程和焦点坐标;
(Ⅱ)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0696be1d4b3531a7d02e2b4172783736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77ce31833750a319b3c2db7837a110d.png)
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2019-05-30更新
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2卷引用:【区级联考】北京市房山区2019届高三第二次高考模拟检测数学(理科)试题
解题方法
4 . 已知抛物线
过点
,
是抛物线
上异于点
的不同两点,且以线段
为直径的圆恒过点
.
(I)当点
与坐标原点
重合时,求直线
的方程;
(II)求证:直线
恒过定点,并求出这个定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab73e34a1c465dc7c9d822eb5b47bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc7ee0164b57b5ee701ef467a49ae697.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(I)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
(II)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解题方法
5 . 已知抛物线C:
的焦点为F,A为C上异于原点的任意一点,过点A的直线l交C于另一点B,交x轴的正半轴于点D,且有
,当点A的横坐标为3时,
为正三角形.
Ⅰ
求C的方程;
Ⅱ
若直线
,且
和C有且只有一个公共点E,试问直线AE是否过定点,若过定点,求出定点坐标;若不过定点,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4b2476be374dd8f4a0bf64a596af5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e88c9366bb209931c6b28353dbab9a52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
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解题方法
6 . 已知过抛物线
的焦点
,斜率为
的直线交抛物线于
两点,且
.
(1)求该抛物线
的方程;
(2)已知抛物线上一点
,过点
作抛物线的两条弦
和
,且
,判断直线
是否过定点?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c56b0fdb00700c10f859f885c9b61720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e84da8cdea820c6ae310a1cf9e65d7e.png)
(1)求该抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知抛物线上一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d494b9297da0f3ed71cb0750a197e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21402367709de8a3cb28d3444d33a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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10卷引用:【区级联考】北京市海淀八模2019届高三文科数学模拟测试题(二)
【区级联考】北京市海淀八模2019届高三文科数学模拟测试题(二)北京市海淀八模2019届高三理科数学模拟测试卷(二)广西柳州市2018届高三毕业班上学期摸底联考数学(理)试题安徽省淮北市第一中学2017-2018学年高二上学期期中考试数学(理)试题(已下线)2017-2018学年第一学期期末复习备考之精准复习模拟题高三年级(理)人教版数学试题(A卷)(已下线)黄金30题系列 高二年级数学(理) 大题好拿分【基础版】(已下线)黄金30题系列 高二年级数学(文) 大题好拿分【基础版】安徽省合肥庐阳高级中学2017-2018学年高二(上)期末考试理科数学试题北京市十一学校2022-2023学年度高二上学期第一学段数学Ⅰ课程教与学诊断试题北京市十一学校2022-2023学年高二上学期期中数学试卷
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解题方法
7 . 已知
是直线
上的动点,点
的坐标是
,过
的直线
与
垂直,并且
与线段
的垂直平分线相交于点
.
(1)求点
的轨迹
的方程;
(2)设曲线
上的动点
关于
轴的对称点为
,点
的坐标为
,直线
与曲线
的另一个交点为
(
与
不重合),是否存在一个定点
,使得
三点共线?若存在,求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4180dae966f648d368a10edf3b7e3c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a812a9b58ccba331cfd21d244329af01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c5ded94e4b1c1e49bb4c0e3b8b31443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
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2017-03-03更新
|
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5卷引用:【全国百强校】北京市中国人民大学附属中学2019届高三高考信息卷(一)文科数学试题