1. The problem statement, all variables and given/known data I attached the problem 2. Relevant equations 3. The attempt at a solution When I try to apply the nth-term test on the sequence, (-1)^n+1, I get an indeterminate form; so, I try to raise e to the ln[(-1^n+1)], but I run into the same problem. How do I take the limit, in this instance, in order for the nth-term test to decide anything?