Which parent function is graphed below? 10+
8
4-
8
A. y -
O B. y=
O C. y = x
O D. y = x

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.