• 2022-06-06
    设 [img=16x19]18030b7d1d1a17d.png[/img] 为 3 阶方阵, [img=15x19]18030b7d2502f11.png[/img] 为 [img=40x20]18030b7d2d14e7c.png[/img] 矩阵, 则下列矩阵中, [ ]一定是对称矩阵.
    A: [img=68x25]18030b7d35dfe28.png[/img]
    B: [img=46x23]18030b7d3e97474.png[/img]
    C: [img=44x23]18030b7d46c6bfc.png[/img]
    D: [img=60x25]18030b7d4f1fdcf.png[/img]
    E: [img=60x23]18030b7d57840d6.png[/img]
    F: [img=66x25]18030b7d5faaf20.png[/img]
    G: [img=61x23]18030b7d689a2e4.png[/img]
    H: [img=107x25]18030b7d711c334.png[/img]