Help pls I have a practice for my case21 and i need the answer to this and it's important that i pass this True or False
I will mark you brainliest

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.