• 2022-06-01
    ‌已知二维连续型随机变量(X,Y)在单位圆内均匀分布,(X,Y)的联合概率密度函数为[img=206x61]180348df2a6be1f.png[/img],则c的值为​
    A: 1
    B: [img=11x14]180348df328f48c.png[/img]
    C: [img=29x25]180348df3beeee5.png[/img]
    D: [img=38x25]180348df43e1e61.png[/img]