分布函数的性质 F(x)单调不减,即 Vx1<x2F(x1)≤F(x2) 口0≤F(x)≤1且 lim F(x)=l, lim F(x)=0 x-)+0 x→)-00 口F(X)右连续,即 F(x+0)=lm F(t)=F(x) t→x+0分布函数的性质 ❑ F ( x ) 单调不减，即 , ( ) ( ) 1 2 1 2  x  x F x  F x ❑ 0  F(x) 1 且 lim ( ) =1, lim ( ) = 0 →+ →− F x F x x x ❑ F ( x ) 右连续，即 ( 0) lim ( ) ( ) 0 F x F t F x t x + = = → +