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若矩陣A滿足(1)零行(元素全為0的行)在最下方;(2)非零首元(即非零行的第一個不為零的元素)的列標號隨行標號的新增而嚴格遞增,則稱此矩陣A為階梯形矩陣.2 0 2 10 5 2 -20 0 3 20 0 0…
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