设
为
所在平面内一点,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7a0e2dba2c3355836e0d8d04f5f5fa0.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e80dcb5c1da07e0538cc33fb815a587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7a0e2dba2c3355836e0d8d04f5f5fa0.png)
更新时间:2023-12-14 09:51:24
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