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[几何] 折射定理可以解决本题？

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goft Posted 2015-1-27 15:43 |Read mode

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kuing Posted 2015-1-27 16:40

将B或C反射上去变成光折射，然后由折射定律sin什么的解出A的位置

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其妙 Posted 2015-1-29 23:49

回复 2# kuing
牛笔！
那么也可以柯西不等式

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