• 2022-06-29
    设A为n阶对称矩阵,则A为正定矩阵的充分必要条件是( ).
    A: [img=6920x521]1802f8f1a91619b.png[/img]
    B: [img=6920x521]1802f8f1b67adb2.png[/img]
    C: [img=6920x521]1802f8f1c3e9b95.png[/img]
    D: A与单位矩阵合同