1. The problem statement, all variables and given/known data Determine whether the series converges absolutely, conditionally, or not at all. a) [tex]\Sigma[/tex] (-1)nn4/(x3 + 1) b) [tex]\Sigma[/tex] sin(x)/x2 2. Relevant equations 3. The attempt at a solution a) positive series is n4/n3+1 .. do i do comparison test ?? b) |sin(x)|/x2 compare it with 1/x2 which converges.. so it's absolutely convergent??