设F,E分别是椭圆
的左,右焦点,椭圆上存在点N,满足
且
的面积为20.
(1)求b的值;
(2)设点P的坐标为
,直线过点P,与椭圆交于点A,B,线段
的中点记为M.若
是
与
的等比中项,求a的最小值,并求出此时直线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d71528844499d541fb06d16147a1cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35a55ff4c434ce34d90382cea5afb85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08fffabcb0a245d00182082c8cc99349.png)
(1)求b的值;
(2)设点P的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c832f2474efe89961ef41e884da7660c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cb79ed88746f9163c7c6b0b674556de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4522fdddbca40f55f3130c4c44e0bb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03e944586ad3d14e01f4d1ad9d8f4910.png)
22-23高二上·湖南长沙·期末 查看更多[2]
湖南省长沙市雅礼教育集团2022-2023学年高二上学期期末数学试题(已下线)期末测试卷04(测试范围:第1-5章)-2023-2024学年高二数学《重难点题型·高分突破》(人教A版2019选择性必修第二册)
更新时间:2023-02-15 15:23:48
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解答题-证明题
|
适中
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【推荐1】已知椭圆
和双曲线
有公共的焦点
、
,P是两曲线的一个交点.
(1)求
;
(2)求证:
;
(3)求证:
的面积为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4d0b4d60f28a0a82eaeb506ac58bc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae28f18db533bf6764b4451b60dfeb54.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3ba776cc1b52d5f1f6530d494947a5f.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002ed1ebb2cb936e10ab478789f91c7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905c203b07b9dec248a710af45e86b78.png)
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【推荐2】已知定点
,
,
,以
为一个焦点作过
、
的椭圆,求另一个焦点
的轨迹方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606162615abde3873ade3dc127bedbd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9699c0777ff7fd0b351bac88e434f24b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6dcd172e60c58723112a9e54164543.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/a0ed1ec316bc54c37c4286c208f55667.png)
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解题方法
【推荐1】已知椭圆
的右焦点为F,且F与C上点的距离的取值范围为[1,3].
(1)求C的方程;
(2)已知О 为坐标原点,点P在C上,点Q满足
,求直线
斜率的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
(1)求C的方程;
(2)已知О 为坐标原点,点P在C上,点Q满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/775bc8a9f6d2524055d53b4c1c948356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
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解题方法
【推荐2】已知
,
是椭圆
:
的左、右焦点,动点
在椭圆上,且
的最大值为3,离心率为
.
![](https://img.xkw.com/dksih/QBM/2022/3/2/2927378697338880/2936266565222400/STEM/ef7f079d27574787b1671c49190324e8.png?resizew=187)
(1)求椭圆的标准方程:
(2)动点
在抛物线
:
上,过点
作椭圆
的两条切线分别交直线
于
,
两点.当
时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ef569668e797b1e94257fd5f4384dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2022/3/2/2927378697338880/2936266565222400/STEM/ef7f079d27574787b1671c49190324e8.png?resizew=187)
(1)求椭圆的标准方程:
(2)动点
![](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/8e8953ded144195804384dcb494d5e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.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/84cef568cfe2fc12a4dec11533ada274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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【推荐1】如图,已知椭圆
的方程为
,
,
,
,点
是椭圆
上任一点,
是以
为直径的圆.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/21/91d45fac-4924-45bc-834d-a217ed9036c9.png?resizew=205)
(1)当
的面积为
时,求
所在直线的方程;
(2)当
与直线
相切时,求
的方程;
(3)求证:
总与某个定圆相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271e595c257e4c0ade90a9bbbf0e6b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9bece414af7ecb2d796dc8a6f549e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e62a44b8712ce4483b8710cda0dc1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71885f023172807ad43f2c9a670aa960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/21/91d45fac-4924-45bc-834d-a217ed9036c9.png?resizew=205)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e24f048f9a87274863ba2c037d7a5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabea664e61863b3b3279dbce607924e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
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