a telephone pole as people whether they like playing golf of the 80,000 people polled 55% like playing golf how many people said they like playing golf

Let x have probability generating function gx (s) and let un generating function u(s) of the sequence uo, u1, satisfies p(x > n). show that the (1- s)u(s) = 1 - gx(s), whenever the series defining these generating functions converge.