F(z)=P{z《Z}=P{z《XY}当y=0时,F(z)=P{z《0}当y=1时,F(z)=P{z《X}即F(z)=0.5P{z《0}+0.5P{z《X}因为X恒大于0,所以当z《0时,P{z《X}=1即F(z)=0.5P{z《0}+0.5当z>0时,F(z)=0.5P{z《X}因为0.5P{z《X}肯定小于0.5,所以肯...
您第一步好像写错了F(z)=P{Z《z}=P{xy《z}应该是这样的吧
确实,写错了不好意思。应该是下面这样:F(z)=P{Z《z}=P{XY《z}当y=0时,F(z)=P{z》0}当y=1时,F(z)=P{z》X}即F(z)=0.5P{z》0}+0.5P{z》X}因为X恒大于0,所以当z