What is the exponent for cubed number?
Exponent will be a 2
Exponent will be a 3
Exponent will be a 4

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.