如图,在
中,D为边BC的中点,E为AD靠近A点的三等分点,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc99a401bb795fac32730be2578f9eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/22/6f43cbd7-761a-4947-a2c7-a61fda4f9463.png?resizew=141)
更新时间:2023-06-19 14:33:15
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