设二维随机变量(X,Y)的概率密度为f(x,y)={e^-y,0<x<y;0,其他.}求Z=X+Y

日期:2014-11-23 23:39:11 人气:1

设二维随机变量(X,Y)的概率密度为f(x,y)={e^-y,0<x<y;0,其他.}求Z=X+Y

http://zhidao.baidu.com/question/177998104.html?qbl=relate_question_1&word=X%2CY%29%B5%C4%B8%C5%C2%CA%C3%DC%B6%C8%CE%AAf%28x%2Cy%29%3D%7Be%5E-y%2C0%3Cx%3Cy%3B0%2C%C6%E4%CB%FB.%7D%C7%F3Z%3DX%2BY%B5%C4%B8%C5%C2%CA%C3%DC%B6%C8 f(X,Y)关于X的
    A+
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