PGF of Discrete Random Variable
I am trying to show that the discrete random variable....
P(R=j) = , j = 0,1,2,.... 0<p<1
Has a P.G.F.....
GR(s) = ( )^2
Above is meant to be the whole fraction to the power 2, but i was having some Latex Syntax problems showing that (Thinking)
I have tried changing and to and taking it outside the summation when beginning to try and find the PGF but i didnt get anywhere, help needed please! (Nod)
Also maybe = 1 for any a where a < 1 can be used? i cant see how though!