设(X,Y)的概率密度为f(x,y)=x+y (0

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设(X,Y)的概率密度为f(x,y)=x+y(0设(X,Y)的概率密度为f(x,y)=x+y(0设(X,Y)的概率密度为f(x,y)=x+y(0f(x,y)=x+y(0楼主的答案计算有误,min(x,

设(X,Y)的概率密度为f(x,y)=x+y (0
设(X,Y)的概率密度为f(x,y)=x+y (0

设(X,Y)的概率密度为f(x,y)=x+y (0
f(x,y)=x+y (0

楼主的答案计算有误,min(x,y)中,当0