1 . 点
为坐标原点,过点
的直线与抛物线
交于
,
两点,且
.
(1)求抛物线的方程;
(2)动点
,
为抛物线在第一象限内两点,且直线
与直线
的倾斜角互补,求证:
是定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437f923730cfbd1bc6f62738d607eca7.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/3825ccc273ef9a672a606432d165b866.png)
(1)求抛物线的方程;
(2)动点
![](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/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dafebaaf13781120dc57c277d0267c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/297bc912cb09546db07e4fb6be67af40.png)
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2 . 如图,已知抛物线
上的点R的横坐标为1,焦点为F,且
,过点
作抛物线C的两条切线,切点分别为A、B,D为线段PA上的动点,过D作抛物线的切线,切点为E(异于点A,B),且直线DE交线段PB于点H.
![](https://img.xkw.com/dksih/QBM/2022/4/18/2960969175646208/2961631696683008/STEM/83f438a1791641239e51c26df70965e2.png?resizew=231)
(1)求抛物线C的方程;
(2)求证:
为定值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/038f8c43f8fa99611a40c95cf8899a28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a297f399ee48fe07cd6aacc935a1c46.png)
![](https://img.xkw.com/dksih/QBM/2022/4/18/2960969175646208/2961631696683008/STEM/83f438a1791641239e51c26df70965e2.png?resizew=231)
(1)求抛物线C的方程;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1489a936094d62ca200619405600fc9a.png)
您最近一年使用:0次
2022-04-19更新
|
935次组卷
|
5卷引用:安徽省六安市舒城中学2022届高三下学期一模文科数学试题
安徽省六安市舒城中学2022届高三下学期一模文科数学试题(已下线)回归教材重难点04 圆锥曲线-【查漏补缺】2022年高考数学(文)三轮冲刺过关(已下线)第10讲 高考难点突破二:圆锥曲线的综合问题(定值问题) (精讲)陕西省铜川市耀州中学2022届高三下学期热身冲刺考文科数学试题河南省鹤壁市浚县第一中学2022-2023学年高三上学期11月考试文科数学试题
解题方法
3 . 已知抛物线
:
的焦点为
,点
为坐标原点,直线
过点
与抛物线
相交于
,
两点(点
位于第一象限).
(1)求证:
为定值;
(2)过点
作
的平行线与抛物线
相交于另一点
,求点
横坐标的取值范围.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](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/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/5963abe8f421bd99a2aaa94831a951e9.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ace585d3cc2e113a0927cdf9e56756a.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
解题方法
4 . 已知抛物线
的焦点为F,点
是抛物线C上一点,
.
(1)求抛物线C的方程;
(2)过
的直线l与抛物线C相交于A,B两点,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ea1be9b9b6bb12afa7e1ce703d1603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4be3a55efb9e423e27ca1e6a43881788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab3bbeeae1973ece0a8224d7f22bc6f.png)
(1)求抛物线C的方程;
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a54b5669e303d494def8a29bbb9c74e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f455feb1bbf4bf5c409cb58b726b7899.png)
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2022-03-15更新
|
517次组卷
|
2卷引用:安徽省“皖东县中联盟”2021-2022学年高三上学期期末联考文科数学试题
名校
解题方法
5 . 已知抛物线
的焦点为F,点
是抛物线C上一点,点Q是PF的中点,且Q到抛物线C的准线的距离为
.
(1)求抛物线C的方程;
(2)已知圆
,圆M的一条切线l与抛物线C交于A,B两点,O为坐标原点,求证:OA,OB的斜率之差的绝对值为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b218bde519e649de7e9948fb6f5339a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec85f29c0860b57a8f0cf8098c13a97e.png)
(1)求抛物线C的方程;
(2)已知圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/458dbdcb41990fa07ef20e80cf9ecb83.png)
您最近一年使用:0次
2022-03-15更新
|
636次组卷
|
4卷引用:安徽省“皖东县中联盟”2021-2022学年高三上学期期末联考理科数学试题
安徽省“皖东县中联盟”2021-2022学年高三上学期期末联考理科数学试题福建省福州第一中学2022-2023学年高二上学期教学质量检测(12月)数学试题 河北省辛集市2022-2023学年高二上学期期末数学试题(已下线)专题18 圆锥曲线高频压轴解答题(16大题型)(练习)
6 . 斜率为1的直线交抛物线
于A,B两点,且弦AB中点的纵坐标为2.
(1)求抛物线C的标准方程;
(2)已知点
在抛物线C上,过点P作两条直线PM,PN分别交抛物线C于M,N(M,N不同于点P)两点,且
的平分线与y轴垂直,求证:MN的斜率为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
(1)求抛物线C的标准方程;
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dda1d7b3982b398ffa32f3dbfdfe787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
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7 . 已知点A,B是抛物线x2=2py(p为常数且p>0)上不同于坐标原点O的两个点,且
.
(1)求证:直线AB过定点;
(2)过点A、B分别作抛物线的切线,两切线相交于点M,记
OMA、
OAB、
OMB的面积分别为S1、S2、S3;是否存在定值
使得
=
S1S3?若存在,求出
值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1695034a4c212e5568fe41625fd2a417.png)
(1)求证:直线AB过定点;
(2)过点A、B分别作抛物线的切线,两切线相交于点M,记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c42e278b09e6ad8956418c47463a376.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
8 . 已知抛物线
的焦点为
,动直线
过点
且与抛物线
交于
,
两点,且当直线
与
轴垂直时,
.
(1)求抛物线
的方程;
(2)连接
,
并延长,分别交抛物线
于点
,
,设
的面积为
,四边形
的面积为
(其中
为坐标原点),求证:
是定值,并求出该值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.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/00ed24bfcc37b79fe9ca61ed8fdf26ea.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d609cb7f8b4d79e8b65c0b8a0672d240.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eaceb8d6c6927e14d9ac7a557a2b11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/145a3aa3b348dc06784d59c149a0ad65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150a135bbd528daf3f19a58a621a57c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8d445b0ac844bae7021456ff381b8f.png)
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2022-02-26更新
|
281次组卷
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2卷引用:安徽省A10联盟2021-2022学年高二下学期开年考数学试题
解题方法
9 . 在平面直角坐标系
中,
是抛物线E:
上一点.若点M到点
的距离、点M到y轴的距离的等差中项是
.
(1)求抛物线E的方程;
(2)过点
作直线l,交以线段AO为直径的圆于点AB,交抛物线E于点C,D(点B,C在线段AD上).问是否存在t,使点B,C恰为线段AD的两个三等分点?若存在,求出t的值及直线l的斜率;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22962a2ad892cb6b14ab039a06e8cdc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4356a596535d4e905ae47e191940f34f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d6917f6fff951d81ef9fa97274caac3.png)
(1)求抛物线E的方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb6aa099bab1a6a3090deff25b6f0811.png)
您最近一年使用:0次
名校
解题方法
10 . 已知抛物线
:
,点
在抛物线上.
(1)求抛物线
的焦点坐标和准线方程;
(2)若直线
:
交抛物线
于M、N两点,交直线
:
于点P,记直线AM,AP,AN的斜率分别为
,
,
,求证:
,
,
成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884b9f7c0bd7f6bbecd541335a3c00d7.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe5b3ed6c60d8fa5a07074fd7ef2ea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf434334b09cc0fdd4e86e84e6ceb00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf434334b09cc0fdd4e86e84e6ceb00.png)
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2022-02-05更新
|
453次组卷
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5卷引用:安徽省皖西七校2021-2022学年高二上学期期末联考数学试题