已知在△ABC,点D、E分别在边AB、AC上,
BE与DC交于点F,直线AF与BC交于点G,若
,则
的取值范围是__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ae448f019e3d0f19643b24eeda2f9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c74650304fd754317a644e7e232786b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b007aad0f5a3a3d76254d2c06bb14def.png)
更新时间:2020-05-05 22:17:07
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