题目内容
若矩阵A可逆，则矩阵AB的秩等于矩阵B的秩.
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n阶矩阵A可逆的充要条件是A能表示成一些初等矩阵的乘积
可逆矩阵一定能经过一系列的初等变换化为单位矩阵.
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Replace the highlighted word with a word of opposite meaning from the box.用以下10个单词填空完成句子,注意单词形式。(after I difficult I formal I last I long I seldom I wrong I younger)The Millers gave a big party on Ling's first____evening In San Francisco.
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