设随机变量(X,Y)的联合概率密度[img=241x53]1802d3f19d42030.png[/img]，则[img=260x51]1802d3f1a6a2aaa.png[/img]
举一反三
- 设随机变量(X,Y)的联合概率密度[img=241x53]1802daf43c2cce7.png[/img]，则[img=260x51]1802daf446f6e0b.png[/img]
- 设随机变量(X,Y)的联合概率密度[img=241x53]1803c286587e44b.png[/img]，则[img=260x51]1803c2866370f6f.png[/img]
- 设随机变量(X,Y)的联合概率密度[img=241x53]1803c33505b0018.png[/img]，则[img=260x51]1803c3351137179.png[/img]
- 设随机变量(X,Y)的联合概率密度[img=241x53]1803710ab868d35.png[/img]，则[img=260x51]1803710ac4460e4.png[/img]
- 设随机变量(X,Y)的联合概率密度[img=241x53]18038eca826968b.png[/img]，则[img=260x51]18038eca8d6cf41.png[/img]