若椭圆
:
(
)与椭圆
:
(
)的焦距相等,给出如下四个结论:
①
和
一定有交点;
②若
,则
;
③若
,则
;
④设
与
在第一象限内相交于点
,若
,则
.
其中,所有正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff730b8025a2ce7e75576a6d74ff3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77e0ddeac5d77078e2453f9402b40553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b4417a60679d8d49cb674166988a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/250bd38b5bb4c9c06011ce6fd9f0729e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6784d29f0dc8ec1e4fa0bde2ddee61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677b1ff93f4faaed1e5eccbff7044079.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ade3a1d01605706801e238726e55fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02b3147e317fc4f5d09fdb8e9c8946d.png)
④设
![](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/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06169bf9ad76c32fe3db7d14ad4b6b44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b321b66145a2ed6b30d30b62fd8acb.png)
其中,所有正确结论的序号是
19-20高二上·湖北随州·期末 查看更多[3]
湖北省随州市2019-2020学年高二上学期期末数学试题(已下线)专题2.5 圆锥曲线的共同性质-2020-2021学年高二数学课时同步练(苏教版选修1-1)(已下线)2.2.2 椭圆的性质(十八大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
更新时间:2020-03-10 18:16:49
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