作业帮设二维随机变量(X,Y)的概率密度为f(x,y)=2-x-y ,0
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/24 08:36:27
x){nߓ]=woy9ٜ]OglЉ|>ٲ}O=ݵɎ]i:F
:6IE/ Bl#t# 3#l5C4@.QSi 4ЩSZ5)%YIy5`0mFJ~JH*AXk V, 4Cmkr& \ckwC>Ө
@>`ijBDiTi>XQՄhJ)h+7K<;hD9SAa4@hR t0
设二维随机变量(X,Y)的概率密度为f(x,y)=2-x-y ,0
设二维随机变量(X,Y)的概率密度为f(x,y)=2-x-y ,0
设二维随机变量(X,Y)的概率密度为f(x,y)=2-x-y ,0
设T=X-Y
则X=(Z+T)/2
Y=(Z-T)/2
f(z,t)=f(x(z,t),y(z,t))*|det(jacobian)|
jacobian=[(dx/dz,dx/dt),(dy/dz,dy/dt)]=[(1/2,1/2)(1/2,-1/2)]
|det(jacobian)|=|-1/4-1/4|=1/2
f(x(z,t),y(z,t))=2-(x+y)=2-z
f(z,t)=(2-z)/2
T=X-Y~(0,1)
fZ(z)=∫(t~(0,1))f(z,t)dt=(2-z)t/2](t~(0,1))=(2-z)/2
0
设T=X-Y
则X=(Z+T)/2
Y=(Z-T)/2
f(z,t)=f(x(z,t),y(z,t))*|det(jacobian)|
jacobian=[(dx/dz,dx/dt),(dy/dz,dy/dt)]=[(1/2,1/2)(1/2,-1/2)]
|det(jacobian)|=|-1/4-1/4|=1/2
f(x(z,t),y(z,t))=2-(x+y)=2-z
f(z,t)=(2-z)/2
T=X-Y~(0,1)
fZ(z)=∫(t~(0,1))f(z,t)dt=(2-z)t/2](t~(0,1))=(2-z)/2
0
设二维随机变量(X,Y)的概率密度为f (x,y)=6x,0
设二维随机变量(X,Y)的概率密度为f（x,y）=1 0
设二维随机变量(X,Y)的概率密度为f(x,y)=axy,0
设二维随机变量(X,Y)的概率密度为f(x,y)=cxy,0
设二维随机变量(X,Y)的概率密度为$f(x,y)={(c,0
设二维随机变量(X,Y)的概率密度为f(x,y)=cxy,0
设二维随机变量(X,Y)的概率密度为f(x,y)=cxy,0
设二维随机变量（X,Y)的概率密度为f(x,y）=1（0
设二维随机变量（X,Y）的概率密度为：f(x,y)=[cx^2y x^2
设二维随机变量（X,Y）的概率密度为：f(x,y)=[cx^2y x^2
设二维随机变量(X,Y)的概率密度为f(x,y)=4.8y(2-x),0
设二维随机变量(X,Y)的概率密度为f(x,y)=kx(x-y),0
设二维随机变量(X,Y)的联合概率密度为f(x,y)=｛①1/8(x+y),0
设二维随机变量(X,Y)的概率密度为f(x,y)=A(x+y),0
设二维随机变量（X,Y）的概率密度为f（x,y）=2-x-y
设二维随机变量(X,Y)的概率密度为f(x,y)=2-x-y ,0
设二维随机变量(X,Y)的概率密度为f(x,y)= 2-x-y,0
设二维随机变量(X,Y)的联合概率密度为f(x,y)={e的-y次方 ,0