1. The problem statement, all variables and given/known data heres the equation that will converge conditionally: http://img440.imageshack.us/img440/9945/untitled3jg.jpg [Broken] changes to An = n/(1 + nLNn) 2. Relevant equations alternating series equation. converges conditionally. d/dn An = (1-n)/(1+nLNn)^2 3. The attempt at a solution I'm not sure how the first equation changes to the second equation, and then i'm supposed to use l'hopitals rule. any help please.