• 2022-06-26
    二次型[img=226x27]18034e63295cb89.png[/img]的矩阵为( ).
    A: [img=53x51]18034e63317ab70.png[/img]
    B: [img=67x51]18034e633a00af1.png[/img]
    C: [img=67x51]18034e63427b1bb.png[/img]
    D: [img=67x51]18034e6349e7788.png[/img]
  • 举一反三