已知椭圆
的左右顶点分别为A,B,点P为椭圆上异于A,B的任意一点.
(1)求直线PA与PB的斜率之积;
(2)任意过
且与x轴不重合的直线交椭圆E于M,N两点,证明:以MN为直径的圆恒过点A.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5995443e8664885123649292d419033.png)
(1)求直线PA与PB的斜率之积;
(2)任意过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de80e0fc1c378d853dfce8db9177fbd.png)
更新时间:2022-12-03 20:49:33
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【推荐1】设
是椭圆
(
)的左焦点,
是
上一点,且
与
轴垂直,若
,椭圆的离心率为
.
(1)求椭圆
的方程;
(2)以椭圆
的左顶点
为
的直角顶点,边
与椭圆
交于
两点,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b67528f875a6d4bac8bbf784f7b66a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab757510576b299be4c0c1e81207aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)以椭圆
![](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/16834582e86f9c1030a4a4b316fab909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df7fc746f8c4801d8f2f0471ba3297e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdb21011ea821b91d539cb763aac649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
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【推荐2】设A,B是椭圆C:
的左右顶点,P为椭圆上异于A,B的一点.
(1)D是椭圆C的上顶点,且直线PA与直线BD垂直,求点P到x轴的距离;
(2)过点
的直线
(不过坐标原点)与椭圆C交于M,N两点,且点M在x轴上方,点N在x轴下方,若
,求直线
的斜率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d80b861ba40387cb2bcd04945f5a371a.png)
(1)D是椭圆C的上顶点,且直线PA与直线BD垂直,求点P到x轴的距离;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a62c9695f5a1691c5fe8724fa764b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a52d0037129796d3fe73593b5c2ff121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐1】已知椭圆
:
,点
、
分别是椭圆
的左焦点、左顶点,过点
的直线
(不与x轴重合)交椭圆
于A,B两点.
(2)若
,求
的面积;
(3)是否存在直线
,使得点B在以线段
为直径的圆上,若存在,求出直线
的方程;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/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9bece414af7ecb2d796dc8a6f549e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dd31773f55719ebd91ed3389d0de68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23a84757fa1fc2e9bf6134c12dce7fe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(3)是否存在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐2】已知点
和直线
,
为曲线
上一点,
为点
到直线
的距离且满足
.
(1)求曲线
的轨迹方程;
(2)过点
作曲线
的两条动弦
,若直线
斜率之积为
,试问直线
是否一定经过一定点?若经过,求出该定点坐标;若不经过,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7422cbdb4ad06d155abb2ccdb25ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30654fd76c7f298a6279606b23d18552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a76af4a094edcdc6bd9900f26481372.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/383f12cb70ca55eba4ff012771dbfa9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐1】已知椭圆C:
的离心率为
,左焦点为
,过点
且斜率为
的直线
交椭圆于A,B两点.
(1)求椭圆C的标准方程;
(2)在y轴上,是否存在定点E,使
恒为定值?若存在,求出E点的坐标和这个定值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e1a85a657231ef717809d5a839ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56286216c1c313e19f4a196fcaba6b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(1)求椭圆C的标准方程;
(2)在y轴上,是否存在定点E,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dfd1a880863384975be44c2038c7645.png)
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【推荐2】如图,在平面直角坐标系xOy中,椭圆
过点
,
,其中e为椭圆的离心率,过定点
的动直线l与椭圆交于A,B两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/eec5c8c1-e652-4624-b046-ee8023333f18.png?resizew=199)
求椭圆的方程;
设椭圆的右准线与x轴的交点为M,若
总成立,求m的值;
是否存在定点
其中
,使得
总成立?如果存在,求出点M的坐标
用m表示
;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df4f17848c072b51e80d427d486e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5787b3d4d9ab6aad4c73a35993e1ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf992e9fc9d23664f7a7b3cd6fbe906f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ec9ca77200280c2696202517ef88067.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/eec5c8c1-e652-4624-b046-ee8023333f18.png?resizew=199)
![](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/4256bbfa8f3be744a77598a133fe52e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bb89a362c1faf4d0c306eabbb59710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec61d2179863351bfae4e3e8a49cf41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80d61c6ddf6afa7d78122fe57df96ff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1609bd7022e34f5c4a5b9bc7a9cd87a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00674bab694988593ecbfb918fe9d60d.png)
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【推荐1】已知椭圆
的长轴长是4,且过点
.
(1)求椭圆的标准方程;
(2)直线l:
交椭圆于P,Q两点,若点B始终在以PQ为直径的圆内,求实数k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eed6b9540857e386651e191a0a5b5a98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f4157f4e99aa1e461f6bd034084eda2.png)
(1)求椭圆的标准方程;
(2)直线l:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33d6cda3499bda60140e621efc39fee.png)
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【推荐2】已知双曲线C:
=1(a,b>0)的左、右焦点分别为F1(-c,0),F2(c,0),其中c>0, M(c,3)在C上,且C的离心率为2.
(1)求C的标准方程;
(2)若O为坐标原点,∠F1MF2的角平分线l与曲线D:
=1的交点为P,Q,试判断OP与OQ是否垂直,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f2ea8fcb101c2ecba2b2c862eb66b7f.png)
(1)求C的标准方程;
(2)若O为坐标原点,∠F1MF2的角平分线l与曲线D:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b6c59e4ff8a402e25e2190028ed951.png)
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