• 2022-05-27
    设级数[img=95x60]180300efe4a0bd1.png[/img]收敛, 则( )
    A: [img=104x60]180300efed00ad7.png[/img]不一定收敛
    B: [img=104x60]180300efed00ad7.png[/img]均收敛
    C: [img=104x60]180300efed00ad7.png[/img]至少一个收敛
    D: [img=93x60]180300f007d5fee.png[/img]收敛