moi nguoi chu y! bai toan tinh St% ko kho nhung chi sai cho dau la sai
het! co ai da co cach tim U(P) khi cho tin hieu vao chu! neu cho tin
hieu u(t)=1(t) hay t thi de! neu cho u(t)=10*1^2*1(t) hay t^10*1(t)
thi tinh the nao!
mjh dua ra cong thuc tinh U(p) =n!/P^(n+1) voi truong hop T^n*1(t)