• 2022-06-26
    幂级数[img=169x60]1803668bf93491d.png[/img]的和函数为( ).
    A: [img=66x52]1803668c018fb07.png[/img]
    B: [img=63x46]1803668c0b0cec2.png[/img]
    C: [img=63x46]1803668c1409547.png[/img]
    D: [img=63x50]1803668c1c99270.png[/img]