已知A、B是椭圆C:
的左右顶点,过
的直线l交椭圆C于M、N两点,直线AM与直线BN相交于点P,当
最大时,
. 设椭圆的离心率为e,则
=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5829fe58856c0290757a40e26cda072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89f36df71241cbc3d70a7a0af72ac4a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ded4a47543a89c17be98722ed14e71b.png)
更新时间:2024-05-25 22:10:13
|
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填空题-双空题
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解题方法
【推荐1】如图,正六边形的边长为2,点
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在正六边形的外接圆上运动,点
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上且关于圆心
对称,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61557cca4e2f97defc23aeb18b13f724.png)
__________ ;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61557cca4e2f97defc23aeb18b13f724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a10f8bd40e4a7f293185f31d2ef8a0f.png)
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【推荐2】已知正实数
满足
,则
的最大值为_________ ;
的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb0e38d06bde4e0a5ed75573ff6c8e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e76e0a949a9a4d2d3eda9817eb39f5a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34634b6f5c41c90a9ac5894705f54008.png)
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【推荐1】以下四个命题中,正确的题号是__________ .
①函数的最值一定是极值;
②设
:实数
,
满足
;
:实数
,
满足
,则
是
的充分不必要条件;
③已知椭圆
:
与双曲线
:
的焦点重合,
、
分别为
、
的离心率,则
,且
;
④一动圆
过定点
,且与已知圆
:
相切,则动圆圆心
的轨迹方程是
.
①函数的最值一定是极值;
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c743fa90be8b6ff769839150c17af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d339790cffa176fd3365fccd362f0255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
③已知椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb232030ea004ea15fa2eae6ca29411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2df57d345f5862ea23041930e9d134a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33558881906c228c262ff8024dcfc4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33a99190a8fd29c36d5a002e3197cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
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④一动圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad3a4d8eb0a4f3dd417124a19f60066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249b37ef4da3e51a86086c2ffc0e0f4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a44342c2ee26a279265225982499b71.png)
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【推荐2】如图,
是椭圆
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