1 . 已知抛物线C; y2 =2x的焦点为F,准线为l, P为抛物线C上异于顶点的动点.
(1)过点P作准线1的垂线,垂足为H,若△PHF与△POF的面积之比为2:1,求点P的坐标;
(2)过点M(
,0)任作一条直线 m与抛物线C交于不同的两点A, B.若两直线PA, PB 斜率之和为2,求点P的坐标.
(1)过点P作准线1的垂线,垂足为H,若△PHF与△POF的面积之比为2:1,求点P的坐标;
(2)过点M(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
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2 . 如图,
是抛物线
的焦点,
是抛物线上三点(
在第一象限),直线
交
轴于点
(
在
的右边),四边形
是平行四边形,记
,
的面积分别为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/03c47b59-759c-4b8f-a8e3-41d4210ae246.png?resizew=147)
(1)若
,求点
的坐标(用含有
的代数式表示);
(2)若
,求直线
的斜率(
为坐标原点).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc44299a4ce82839a8bc589c3d706e5.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc989f1dde66bcd5099bd65f7f166da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a5c35b41bb1a8fa59998a6dcc791f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eaceb8d6c6927e14d9ac7a557a2b11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3637753af5ce86be9c23a9beb6b5067.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/03c47b59-759c-4b8f-a8e3-41d4210ae246.png?resizew=147)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1299a6d7e782e1b92698e6b5d20d520b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369c6804b271b167a69d4493c72f319a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f731b88b9bc27c6d50a139e418ef7936.png)
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3 . 如图所示,已知点
是抛物线
上一定点,直线
的倾斜角互补,且与抛物线另交于
,
两个不同的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/80984a12-c5be-4d0c-bdff-f177a3aa5f92.png?resizew=172)
(1)求点
到其准线的距离;
(2)求证:直线
的斜率为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e35863acd3e2ad4e5eb056952b9e25a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1bd115fa8e48e214fd2b90b0df6a10.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/2022/12/6/80984a12-c5be-4d0c-bdff-f177a3aa5f92.png?resizew=172)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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2019-11-12更新
|
1001次组卷
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4卷引用:江西省南昌市东湖区第十中学2019-2020学年高二上学期期中数学试题
4 . 已知抛物线
上一点
到其焦点的距离为
.
(1)求
与
的值;
(2)若斜率为
的直线
与抛物线
交于
、
两点,点
为抛物线
上一点,其横坐标为1,记直线
的斜率为
,直线
的斜率为
,试问:
是否为定值?并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25be74ccf1964e0025ca3c2f491cb98b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b807779925d6618db9f24d781b0c7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd422e76d464f861b4bd22ab96bfad2f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e3f7ddd51215d00661c09cd900d60.png)
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2019-10-12更新
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1369次组卷
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8卷引用:黑龙江省哈尔滨市第六中学2019-2020学年高二上学期10月份阶段性总结数学(文)试题
黑龙江省哈尔滨市第六中学2019-2020学年高二上学期10月份阶段性总结数学(文)试题黑龙江省大庆市大庆中学2019-2020学年高二上学期期中数学(文)试题(已下线)2019年12月6日《每日一题》选修2-1理数-直线与抛物线的位置关系(已下线)2019年12月6日《每日一题》选修1-1文数-直线与抛物线的位置关系福建省建瓯市第二中学2019-2020学年高三上学期第二次月考数学(文)试题人教A版(2019) 选择性必修第一册 必杀技 第三章 圆锥曲线的方程 专题5 与圆锥曲线有关的范围、最值、定点、定值问题人教B版(2019) 选择性必修第一册 必杀技 第二章 平面解析几何 专题5 与圆锥曲线有关的取值范围(最值)问题、定点与定值问题苏教版(2019) 选修第一册 一蹴而就 第3章 微专题集训四 与圆雉曲线有关的定点、定值、范围、最值问题
名校
5 . 设抛物线C:y2=2px(p>0)的焦点为F,准线为l.已知以F为圆心,半径为4的圆与l交于A,B两点,E是该圆与抛物线C的一个交点,∠EAB=90°.
(1)求p的值;
(2)已知点P的纵坐标为-1且在抛物线C上,Q,R是抛物线C上异于点P的另两点,且满足直线PQ和直线PR的斜率之和为-1,试问直线QR是否经过一定点,若是,求出定点的坐标;否则,请说明理由.
(1)求p的值;
(2)已知点P的纵坐标为-1且在抛物线C上,Q,R是抛物线C上异于点P的另两点,且满足直线PQ和直线PR的斜率之和为-1,试问直线QR是否经过一定点,若是,求出定点的坐标;否则,请说明理由.
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2020-01-21更新
|
303次组卷
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11卷引用:云南省昆明市2018届高三教学质量检查第二次统考理数试题
云南省昆明市2018届高三教学质量检查第二次统考理数试题【全国百强校】四川省棠湖中学2019届高三上学期第二次月考数学(理)试题(已下线)专题9.10 第九章 平面解析几何 单元测试(测)【理】-《2020年高考一轮复习讲练测》(已下线)卷08-备战2020年新高考数学自学检测黄金10卷-《2020年新高考政策解读与配套资源》(已下线)重组卷03-冲刺2021年高考数学之精选真题+模拟重组卷(新高考地区专用)四川省内江市威远中学2020-2021学年高三3月月考数学(文)试题四川省内江市威远中学2020-2021学年高三3月月考数学(理)试题四川省泸州市江阳区2021-2022学年高三上学期期末数学理科试题四川省泸州市江阳区2021-2022学年高三上学期期末数学文科试题四川省泸州市泸县第四中学2021-2022学年高二下学期第一学月(3月)考试文科数学试题四川省泸州市泸县第四中学2021-2022学年高二下学期第一学月(3月)考试理科数学试题
名校
6 . 已知抛物线E:x2=2py(p>0)的焦点为F,点M是直线y=x与抛物线E在第一象限内的交点,且|MF|=5.
(1)求抛物E的方程.
(2)直线l与抛物线E相交于两点A,B,过点A,B分别作AA1⊥x轴于A1,BB1⊥x轴于B1,原点O到直线l的距离为1.求
的最大值.
(1)求抛物E的方程.
(2)直线l与抛物线E相交于两点A,B,过点A,B分别作AA1⊥x轴于A1,BB1⊥x轴于B1,原点O到直线l的距离为1.求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb267262abdd8714fe1af3495c52ffd.png)
您最近一年使用:0次
7 . 已知抛物线
的焦点为
,准线为
,点
,
在
上的射影为
,且
是边长为
的正三角形.
(1)求
;
(2)过点
作两条相互垂直的直线
与
交于
两点,
与
交于
两点,设
的面积为
的面积为
(
为坐标原点),求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf92a1ba410263d4f68b7e0432b19aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6947c600b9a935d19ceab21fb3fe174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b929a31d169a811004f0ecd6b7984e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/254d90ef7eba319615e1fd6e01f6abd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efd09912705e08177bc86e839c41b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9124c57bc71a56090ab8fdf6e5f40241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b98432cdfb4c27c4b3ff7e349d7faeb5.png)
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2019-08-02更新
|
742次组卷
|
2卷引用:云南省昆明市2018-2019学年高二下学期期末考试数学(文)试题
名校
8 . 已知抛物线
:
上任意一点到其焦点的距离的最小值为1.
,
为抛物线上的两动点(
、
不重合且均异于原点),
为坐标原点,直线
、
的倾斜角分别为
,
.
(1)求抛物线方程;
(2)若
,求证直线
过定点;
(3)若
(
为定值),探求直线
是否过定点,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.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/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/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
(1)求抛物线方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ee4849f60afce5a3a85ccd492314e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2056e7607bdae3be5f1c6dfb426b1e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
解题方法
9 . 已知
,
是曲线
上任意一点,动点
满足
.
(1)求点
的轨迹
的方程;
(2)过点
的直线交
于
,
两点,过原点
与点
的直线交直线
于点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6cffa52177f31cd10c42d00f69d4da1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56c5e13757b70fe6a307166ef7a3e32c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0ff2ac5a9e81e3d892316a179bdb013.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5fcce10d4243fb2a8351db179c2c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afda104df06f7f5d8e805b345739a7a3.png)
您最近一年使用:0次
2019-06-07更新
|
857次组卷
|
2卷引用:【市级联考】2019年福建省莆田市高考二模数学试题(文科)
名校
10 . 已知抛物线
:
的焦点为
,直线
与抛物线
交于
,
两点,
是坐标原点.
(1)若直线
过点
且
,求直线
的方程;
(2)已知点
,若直线
不过点
、不与坐标轴垂直,且
,证明:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/0f85fca60a11e1af2bf50138d0e3fe62.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/1dde8112e8eb968fd042418dd632759e.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ed9d97b8745ed1c15349ea3fffc299.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e810cb506e1746a0a49610e0d897f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5fe1ea3901b1d7c18d4114f86373c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2019-06-07更新
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1889次组卷
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2卷引用:【市级联考】广东省肇庆市2019届高中毕业班第三次统一检测数学(理)试题