Which group of numbers is listed from greatest to least?
-3,-4,-7, -8,-9
9,7,6, -5,4
8,-6,5, 4,1
-3,-1,0,2,7

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.