Need asap . brainliest for correct answer. factor -4m - 4y. a) -4(m + y) b) 4(m - y) c) both a and b d) neither a nor b

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.