哈!很有啟發哎!用反證法:如果二維不共線,可構造一三維例,也不共線。
所有跟帖:
• 嗯,用反證法也許敘述起來會更為容易一些。 -與數學無關- ♂ (0 bytes) () 09/20/2010 postreply 09:28:36
• 嗯,用反證法也許敘述起來會更為容易一些。 -與數學無關- ♂ (0 bytes) () 09/20/2010 postreply 09:28:36
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