已知双曲线C:
的左、右焦点分别为
,
,点M,N分别为C的渐近线和左支上的动点,且
的最小值恰为C的实轴长的2倍,则C的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3040b6c904477030ecf8ba20b2b18759.png)
![](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/b243ce8767b70d490c8fac86e6f4b3f3.png)
2023·湖南长沙·三模 查看更多[2]
更新时间:2023-06-01 11:51:45
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适中
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解题方法
【推荐1】动点
分别到两定点
连线的斜率的乘积为
,设
的轨迹为曲线
分别为曲线
的左、右焦点,则下列命题中:
(1)曲线
的焦点坐标为
;
(2)若
,则
;
(3)当
时,
的内切圆圆心在直线
上;
(4)设
,则
的最小值为
;
其中正确命题的序号是:______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d259822ab64b8626f3893b8432673358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf0ca2f96c24dedf5f2e249b6b47d9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b282c337227aa697d420b8c3c8d4309.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d259822ab64b8626f3893b8432673358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f51ee7c8f57e85269ccf133267ece723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee77d7dd1ba4d28008efce898cce481.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdcd3c857915a02d8f81a8ce6f291bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe46eee0f34da7077132e80b1259708.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f9a699aededce0ad803bf8257fbbcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba53065eb180a682305fddb95d14b62f.png)
(4)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec6a0a7c18e9ab697fc32a84e142f6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da08cf1ebf1375c55a87433526b5db84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bfc6de3e646e636050b22d34eb2dc78.png)
其中正确命题的序号是:
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名校
【推荐2】已知F是双曲线
的右焦点,P是双曲线C左支上的一点,且点A的坐标为
,则
的周长最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b30352c43707c4e54b94ce5b61f2e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4159b0469eb8e61eb5f6278a80176a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceff3844281849df3e37a2e56e110549.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
解题方法
【推荐1】已知双曲线
(
,
),给定的四点
、
、
、
中恰有三个点在双曲线
上,则该双曲线
的离心率是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5c2e64358e0ec7aa142c336d970306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ce9692327f340625ba6882288b2786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f33348b552183b3022bcd911c4f1f5c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8b0345320a6cb4983f0c0e5141861b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04bfd27fa9819bb579918f49a3538e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
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【推荐2】已知O是坐标原点,F是双曲线
的左焦点,平面内一点M满足△OMF是等边三角形,线段MF与双曲线E交于点N,且
,则双曲线E的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d2a1e63de39eae591db9bf2090cc49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4679e6d7be92bc79925afceba9689666.png)
您最近一年使用:0次