【答案解析】解 P(U≤u)=P{max(X，Y)≤u}=P{X≤u，Y≤u}=P(X≤u)P(Y≤u)，
P(U≤1.96)=P(X≤1.96)P(Y≤1.96)=[P(X=0)+P(X=1)]P(Y≤1.96)=
P(U≤1)=P(X≤1)P(Y≤1)=