若A是m x n矩阵，且r（A）=r，则A中（）（单选）—4分 -题库考试答案搜索网

若A是m x n矩阵，且r（A）=r，则A中（）（单选）—4分

单选题

2021-09-06 21:04

A、至少有一个r阶子式不等于0，但没有等于0的r-1阶子式；
B、必有等于0的r-1阶子式，有不等于0的r阶子式
C、有等于0的r-1阶子式，没有等于0的r阶子式；
D、有不等于0的r阶子式，所有r+1阶子式均等于0。

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正确答案

D

试题解析

标签：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

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