1 . 点
在椭圆
上,
不在坐标轴上,
,
,
,
,直线
与
交于点
,直线
与
轴交于点
,设
,
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45f0ee968f9a247871a54e505fbd111b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6743c927491c99e48ad72a15a69e62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3358fc443cb2656245c40cc3a69887e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655c413f509068d30b165f9d92bdba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebeb0c6b3331994e6fced0e825d5638b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5caa401e241fc58fa55bd3a69bb9c5e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d713f5c0e25881914c765c91c164d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
您最近一年使用:0次
名校
2 . 平面几何中,角分线分对边成比例定理是这样的:在
中,角C的平分线交对边于点D,则
,如图,
,
,
,
,则
面积的最大值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207940681c14e76b47f6bfd4c1c9580e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad072c96836c6d9a4bcb61993203fd66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266a628b89b5654e79c05d05d26ab870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6335e1e76da824ca78840684dbf59a6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b8e5990ef4ef314941a3154457a9d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2021/6/2/2734270304247808/2751531060428800/STEM/4b1b9a17-49fe-44d4-96f2-c23924cbedc2.png?resizew=263)
您最近一年使用:0次