[中學] 有關外積
恩...這只是無聊發想,所以不一定真的有答案...
想請問一下如果a,b,c,d皆為向量
且 a ×b = c ×d
那麼有辦法用b,c,d來表示a嗎?
(反正不可能是把b「除」過去就對了~)
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