• 2022-06-06
    ​设矩阵[img=112x51]180368aa2b97dba.png[/img],2阶单位矩阵[img=94x51]180368aa33be3e0.png[/img],3阶单位矩阵[img=121x63]180368aa3db0914.png[/img],则[img=48x22]180368aa45fbedc.png[/img](),[img=48x22]180368aa4f2fc05.png[/img]()‍
    A: [img=60x51]180368aa574c8e7.png[/img],[img=85x51]180368aa6042361.png[/img]
    B: [img=85x51]180368aa68ae455.png[/img],[img=87x63]180368aa775fb54.png[/img]
    C: [img=60x51]180368aa7fd5ae6.png[/img],[img=87x63]180368aa8dac80a.png[/img]
    D: [img=85x51]180368aa96dc809.png[/img],[img=85x51]180368aaa00cce3.png[/img]