Question 401398
There is no solution for that. You can evaluate the sum more easily by rearranging the terms:


(1+p+p^2+p^3+...) + (p+p^2+p^3+p^4+ ...) + (p^2+p^3+p^4+...) + ...


= (1+p+p^2+p^3+...)(1+p+p^2+p^3+...) which converges if and only if {{{-1 < p < 1}}}.