设A为3阶矩阵,将A的第2列加到第l列得矩阵曰,再将曰的第2行与第3行交换得A. P1p2 B.P-11 P2 C.P2P1 D.P2P一11

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问题 设A为3阶矩阵,将A的第2列加到第l列得矩阵曰,再将曰的第2行与第3行交换得
选项 A. P1p2 B.P-11 P2 C.P2P1 D.P2P一11
答案 C
解析 由于将A的第2列加到第l列得矩阵曰,

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