1. The problem statement, all variables and given/known data [PLAIN]http://img265.imageshack.us/img265/6778/complex.png [Broken] I did the coefficient of the w' term. What about the w term? This seems like a fairly standard thing, but I can't seem to find it anywhere. What ansatz should I use for q, if the eqn is written w''+pw'+qw? C/(z-a)²+ D/(z-b)²? Any conditions, except for the one generated by z->1/t substitution? Or should I use C+cz on the top, etc?