• 2022-05-31
    下列函数中哪个函数只在[img=42x18]1803df057d191d1.png[/img]点可导?
    A: [img=138x27]1803df0585aff25.png[/img]
    B: [img=19x25]1803df058e17860.png[/img]
    C: [img=38x19]1803df059672660.png[/img]
    D: [img=79x26]1803df059eef093.png[/img]