解答题-证明题 较难0.4 引用1 组卷1035
已知椭圆
过点
,离心率为
.
(Ⅰ)求椭圆
的方程;
(Ⅱ)过点
且斜率为
(
)的直线
与椭圆
相交于
两点,直线
、
分别交直线
于
、
两点,线段
的中点为
.记直线
的斜率为
,求证:
为定值.
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/c0f903842bbd4fa4b7d3fedcf0614fd0.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/609c9752a2894962bd5adbd641be4c4d.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/11560dbae8e64a9e8c86e6d642e5d2f5.png)
(Ⅰ)求椭圆
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/f08248a86e3e4468a47ff8953e0f26a3.png)
(Ⅱ)过点
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/e23362c6c7d44fa68774d809a56fc3cc.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/d6e33d7ac9b14d28b8c5fd263f22b597.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/3b5c3a2e366d4a8c846959d8166b8276.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/cb79045227cb48eb91f0c6b5d099e6fb.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/f08248a86e3e4468a47ff8953e0f26a3.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/931e9b22456e4e2b885d9c05315ed0c1.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/5934e595a8c44efeb4a5e43153c70cb9.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/d272ee9001a14ba6aee5854d207cbdec.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/e50da1fa4e71418dbfd50eb527befb8e.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/24ba6e5dd95f4184bceab10037b5785b.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/bb739ce9dda949a99fa7c2f7fc648956.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/6ff9c48cc36b4db9b0c7b26d0db8c299.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/4c7a391e777c435199a8132733b25609.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/98f87aa421104214af505f5925795237.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/f08fdbdd580341bd828bace35951125b.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571403986108416/1571403992047616/STEM/d69fe53cb4dd476c9da49c51266e1229.png)
12-13高三·四川内江·阶段练习
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