• 2021-04-14
    青书学堂: (单选题) 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|=( )
    https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1544162120971ede8d17d119c40d78c0b80623e2579c9image19.png