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byf156

木虫 (著名写手)

[交流] 【求助】问个高中的数学问题

a的平方=b(b+c)是A=2B的什么条件? a 、b、 c 是三角形的三条边 ,A、 B、 C 是三个角。

[ Last edited by laizuliang on 2007-9-2 at 08:55 ]
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stardom427

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充分不必要条件,算了下,应该是的

[ Last edited by stardom427 on 2007-6-17 at 22:56 ]
2楼2007-06-17 22:31:28
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honeyman

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充要条件!
3楼2007-06-18 19:47:23
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