1 . 如图所示,在平面直角坐标系中,椭圆
:
的左、右焦点分别为
,
,设
是第一象限内
上一点,
,
的延长线分别交
于点
,
.
(1)求
的周长;
(2)设
,
分别为
,
的内切圆半径,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271e595c257e4c0ade90a9bbbf0e6b0d.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a86380a6d6501f6504dcb4aa5e3099f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae863e7a1f1fed09f1075de4a817c63.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/18/cce594db-9bbe-4a94-8d62-d6d6eb59b659.png?resizew=199)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7733784336d1592cfe38e6a629140ef0.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2858005b9ae89ae080d83dcc13cf8e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3e95410f3b4fcb0cba425b521d1f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7733784336d1592cfe38e6a629140ef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f01d20fc53563351369c9bcb1360c410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fd3d19b0c8b544d52b897ca30990b4.png)
您最近一年使用:0次
2021-11-12更新
|
1575次组卷
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4卷引用:四川省资阳中学2021-2022学年高二下学期期中考试数学(理科)试题
四川省资阳中学2021-2022学年高二下学期期中考试数学(理科)试题浙江省嘉兴一中2021-2022学年高二上学期期中数学试题浙江省浙南名校联盟2023-2024学年高二上学期10月联考数学试题(已下线)理科数学-2022年高考押题预测卷02(全国甲卷)
名校
2 . 已知△ABC是半径为5的圆O的内接三角形,且
,若
,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de28d337fb56eb2417a4902294545905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68404844777717dfdedb084e28694f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
您最近一年使用:0次
2017-09-06更新
|
593次组卷
|
3卷引用:【全国百强校】四川省棠湖中学2017-2018学年高二下学期期中考试数学(理)试题