• 2022-06-05
    设[img=15x19]1802d5dc2c9a64d.png[/img]是一个随机变量,记,为[img=170x27]1802d5dc34dc10d.png[/img],[img=62x22]1802d5dc3d72d1c.png[/img]为常数,则对任意常数[img=13x19]1802d5dc45a3a55.png[/img],必有
    A: [img=202x27]1802d5dc4e8eedd.png[/img]
    B: [img=190x27]1802d5dc5656fd3.png[/img]
    C: [img=190x27]1802d5dc5f43b34.png[/img]
    D: [img=190x27]1802d5dc6c421f0.png[/img]