概率论 设X~fx(X),Y=-2X+1,则fy(y)= 日期:2015-06-15 02:33:51 人气:1 概率论 设X~fx(X),Y=-2X+1,则fy(y)= f(y) = f(x)/|g'(x)| = f{(y-1)/(-2)}/2 = f{(1-y)/2}/2