Lola saved $86.25 in 3 months. she saved $30.75 in the first month and $7.99 in the second month. how much money did lola save in the third month?

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.