1 . 已知双曲线
的左、右焦点分别为
,以
为直径的圆与双曲线在第一、三象限的交点分别为
,设四边形
的周长为
,面积为S,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76369fa11390b35ffe772fd282b58712.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d750ac23802aa73c47a1528227207485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643ef7d761de0e794fc39937dc72ac6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c1e767d442eee07d01a36c08c88d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76369fa11390b35ffe772fd282b58712.png)
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2023-12-05更新
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3卷引用:广东省汕头市潮阳区棉城中学2023-2024学年高二上学期数学竞赛试题