(X,Y)联合概率密度f(x,y)=3y,0

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(X,Y)联合概率密度f(x,y)=3y,0
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(X,Y)联合概率密度f(x,y)=3y,0
(X,Y)联合概率密度f(x,y)=3y,0

(X,Y)联合概率密度f(x,y)=3y,0
题目的意思是这样么?
f(x,y)=3y (0