• 2022-06-29
    函数[img=110x25]180357a4e690f40.png[/img]的傅里叶级数为
    A: [img=146x60]180357a4f1ae95e.png[/img]
    B: [img=144x60]180357a4fc610b8.png[/img]
    C: [img=144x60]180357a5066c08f.png[/img]
    D: [img=146x60]180357a5100e6a4.png[/img]