3.若 A 为 3 阶方阵且=2,则|2A|=( )设 A,B 都是 3 阶矩阵,且|A|=2,B=-2E,则|A-1B|=( ) -题库考试答案搜索网

3.若 A 为 3 阶方阵且=2,则|2A|=( )
设 A,B 都是 3 阶矩阵,且|A|=2,B=-2E,则|A-1B|=( )

单选题

2021-07-17 23:20

A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1544162121067fb2559834d7a408fa1fa72b6057dd6c3image20.png">
B、2
C、4
D、8

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正确答案

C

试题解析

标签：土木工程高起本线性代数 2019级第三学期期末考试

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