解题方法
1 . 如图,在三棱锥
中,
平面
,
为线段
的中点,
分别为线段
和线段
上任意一点,则
的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/0e74daff-21b9-4580-ba23-0e36c63519d0.png?resizew=111)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a14c1efa88dec6d67bf72613c1b9f471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbd4ed2a1556796e14d65c7e8444d437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7919ce583185cfe33ce9653094c24b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9850b3bb656fb98a73a6e6b5ee99c1b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/0e74daff-21b9-4580-ba23-0e36c63519d0.png?resizew=111)
A.![]() | B.![]() | C.![]() | D.2 |
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2023-01-12更新
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2卷引用:广东省广州市华南师范大学附属中学等四所中学2023届高三上学期期末数学试题