• 2022-06-30
    设[img=98x51]1803e0739684aa5.png[/img], [img=14x19]1803e0739f7412c.png[/img]为2阶单位矩阵, 则下列等式中正确的是[ ].
    A: [img=139x51]1803e073aa989b1.png[/img]
    B: [img=139x51]1803e073b565675.png[/img]
    C: [img=139x51]1803e073c02c0d6.png[/img]
    D: [img=139x51]1803e073cb8a3da.png[/img]
    E: [img=139x51]1803e073d62a091.png[/img]
  • 举一反三