名校
解题方法
1 . 如图,已知圆台高为5,上底面
半径为3,下底面
半径为4,△ABC为
的内接三角形,且AB⊥AC,P为
上一点,则PA2+PB2+PC2的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0385df6c7f8ee7ab503b6ed35933695b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0385df6c7f8ee7ab503b6ed35933695b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/0020def4-f62c-4937-837f-e824faf05523.png?resizew=205)
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