设X~N(0,1),则Y=2X+1的概率密度fY(y)=____.
(1/2√2π)e-[(y-1)2/8] 由y=2x+1得x=(y-1)/2,x'=1/2。 ∴fY(y)=fX[(y-1)/2]•(1/2)=1/[2√(2π)]e-[(y-1)2/8]
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