How would I do the following question. I know how to do it with two variables (just B(U) and B(U + V) but I do not know how to figure this out with 4 (or even 3) terms) Thanks for the help.
E [B(U)B(U+V)B(U+V+W)B(U+V+W+x)] where U + V + W > U + V > U and x > 0.
Thanks for the help. By the way the answer is 3U^2 + 3UV + UW.