[理工] 矩陣證明
題目
http://ppt.cc/tW3q
解法
http://ppt.cc/nNoK
請問為什麼第八行可以得到Q=0的結論,我記得AB=0,A or B不一定等於零
手機排版有點亂請見諒
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11/30 20:52, , 1F
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11/30 20:58, 2F
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