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设A是 m×n矩阵，B是 n×m 矩阵，则线性方程组(AB)x=0 ( )（单选）—4分

A、当n〉m时仅有零解

B、当n〉m时必有非零解

C、当m〉n时仅有零解

D、当m〉n时必有非零解

时间：2021-09-06 21:04 关键词：弘成河北建筑工程学院财务管理（本科）工程数学线代及概率作业

答案解析

D

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