• 2022-06-26
    幂级数[img=169x60]1803d6a40008976.png[/img]的和函数为( ).
    A: [img=66x52]1803d6a40856133.png[/img]
    B: [img=63x46]1803d6a41148420.png[/img]
    C: [img=63x46]1803d6a419e551c.png[/img]
    D: [img=63x50]1803d6a422ccf97.png[/img]