已知抛物线
:
的焦点为椭圆
:
的右焦点F,点P为抛物线
与椭圆
在第一象限的交点,且
.
(1)求椭圆
的方程;
(2)若直线l过点F,交抛物线
于A,C两点,交椭圆
于B,D两点(A,B,C,D依次排序),且
,求直线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19c8a423815dd4015632559956bd70da.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)若直线l过点F,交抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5733bec4d08dd1d42da75bd5c53e4145.png)
22-23高三上·云南保山·阶段练习 查看更多[2]
更新时间:2023-08-22 16:00:17
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解题方法
【推荐1】已知点
为椭圆C:
上一点,且直线
过椭圆C的一个焦点.
(1)求椭圆C的方程.
(2)不经过点
的直线l与椭圆C相交于A,B两点,记直线
的斜率分别为
,若
,直线l是否过定点?若过定点,求出该定点坐标;若不过定点,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22840186db0afc0e2b2e8915ce79b998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0accaaa66de4dfd9ed8257fa942c2cff.png)
(1)求椭圆C的方程.
(2)不经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22840186db0afc0e2b2e8915ce79b998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcaebaf8ceed245eba896f36d8ff14b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d53e4863069524d310699691da364dd.png)
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【推荐2】已知椭圆
的离心率为
,且椭圆C过点
.
(1)求椭圆C的标准方程;
(2)过椭圆C的右焦点的直线l与椭圆C交于A、B两点,且与圆:
交于E、F两点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/014fb9d469a4b0b8a907ac416ad13585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4d9ff190d74979422dae71751c6fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce68ab8a64165a8897e088e825bb9191.png)
(1)求椭圆C的标准方程;
(2)过椭圆C的右焦点的直线l与椭圆C交于A、B两点,且与圆:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fce0745e9ae53f8e79f897253c9c7a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ef8af5c95d8bf511747bc219b0d36c.png)
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【推荐1】点P与定点
的距离和它到定直线
的距离之比为
.
(1)求点P的轨迹方程;
(2)记点P的轨迹为曲线C,若过点P的动直线l与C的另一个交点为Q,原点O到l的距离为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
(1)求点P的轨迹方程;
(2)记点P的轨迹为曲线C,若过点P的动直线l与C的另一个交点为Q,原点O到l的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
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【推荐2】在平面直角坐标系中,
为坐标原点,动点
到
,
的两点的距离之和为
.
(1)试判断动点
的轨迹是什么曲线,并求其轨迹方程
.
(2)已知直线
与圆
交于
、
两点,与曲线
交于
、
两点,其中
、
在第一象限,
为原点
到直线
的距离,是否存在实数
,使得
取得最大值,若存在,求出
和最大值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701f3b0e2bedfe5195443459072d798e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc3e8a1475b983d1a4295db0e16d4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc41bc045de9f42164716259c5506c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7c1291733045cf4899839d49f1dae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87d696d9bf311bddb74b915fb3e9506.png)
(1)试判断动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc3e8a1475b983d1a4295db0e16d4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f69c1d7da473ae05bdc17583ea449d98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de8116e741d15031e169dfdb202c489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a28be4d5a16cf245f6fa7c4088fee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9eeee83b4b7c6ceac7828ff534ce15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eacd9c1ce5e65fec29c32f40d86b73d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a28be4d5a16cf245f6fa7c4088fee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bcf9f33389b83d32baf2f784435e80f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701f3b0e2bedfe5195443459072d798e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a159de0b2d9eb1ae0b7e664e64d3c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15befbdad977723a86194979c675ee5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9297c2fcdcf968a5bcb39be2ee8ad8b.png)
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【推荐1】已知抛物线
:
.
(Ⅰ)
、
是抛物线
上不同于顶点
的两点,若以
为直径的圆经过抛物线的顶点,试证明直线
必过定点,并求出该定点的坐标;
(Ⅱ)在(Ⅰ)的条件下,抛物线在
、
处的切线相交于点
,求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
(Ⅰ)
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(Ⅱ)在(Ⅰ)的条件下,抛物线在
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
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【推荐2】已知点F为抛物线C:
(
)的焦点,点
,
,且
.
(1)求抛物线C的标准方程;
(2)若直线l过点Q且与抛物线C相交于A,B两点,
面积为
,求直线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abd313d4e92a762fb7fb0c1cb65263d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f13bf66fc845b115de4ec45b4be0e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9380191d5128132ab5995d3f048d3539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53e53760f14c161a13e1017558dfb28.png)
(1)求抛物线C的标准方程;
(2)若直线l过点Q且与抛物线C相交于A,B两点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
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【推荐1】已知抛物线
的焦点为
,直线
,当
时,
与
相切.
(1)求
的值;
(2)若
交
于
,
两点,点
是
上一点,
的重心为
,求
的值.
![](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/2ae348d099e2bf990ff94bd73d4ce80d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/346927ae9c9adf11b8b3a8048173a08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(2)若
![](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/7f9e8449aad35c5d840a3395ea86df6d.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐2】已知点F为抛物线E:y2=2px(p>0)的焦点,点A(2,m)在抛物线E上,且到原点的距离为2
.
(1)求抛物线E的方程;
(2)已知点G(-1,0),延长AF交抛物线于点B,证明:以点F为圆心且与直线GA相切的圆必与直线GB相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求抛物线E的方程;
(2)已知点G(-1,0),延长AF交抛物线于点B,证明:以点F为圆心且与直线GA相切的圆必与直线GB相切.
您最近一年使用:0次