• 2022-07-26
    已知X的密度函数[img=187x61]1803b692c082735.png[/img],则[img=35x25]1803b692c837a9c.png[/img]可取
    A: [img=47x25]1803b692d020ce6.png[/img]
    B: [img=35x25]1803b692d7a11fe.png[/img]
    C: [img=49x25]1803b692df4c5f3.png[/img]
    D: [img=49x25]1803b692e716e67.png[/img]