• 2022-05-29
    二元函数 [img=134x29]18031b9df2df953.png[/img]的驻点为[img=30x25]18031b9dfa8b774.png[/img]
    A: [img=68x51]18031b9e037d0fc.png[/img]
    B: [img=84x51]18031b9e0be1fe2.png[/img]
    C: [img=68x51]18031b9e1487507.png[/img]
    D: [img=84x51]18031b9e1d1e467.png[/img]