1 . 已知椭圆C:
过点
,其左右焦点分别为
,
,三角形
的面积为
.
Ⅰ
求椭圆C的方程;
Ⅱ
已知A,B是椭圆C上的两个动点且不与坐标原点O共线,若
的角平分线总垂直于x轴,求证:直线AB与两坐标轴围成的三角形一定是等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df4f17848c072b51e80d427d486e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e15e83c607c1c733d34df1f52e40d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09a8ac969e5cec3be6abf4ff44c692e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6758b8b074d33ea9e82818593656e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775ab52cdcbfb7349582b9530986593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3f8c3ba00c59e0634ed10fa85289de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20592db1026476ba6b2ab0ee9c3b08b.png)
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2019-04-03更新
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4卷引用:内蒙古北京八中乌兰察布分校2018-2019学年高二下学期期中数学(理)试题