1. The problem statement, all variables and given/known data So I solved this problem ∑ (-1)^n (x+5)^n by finding the sum of the series to be 1/(x+6), which was correct. I am stuck on the second part of the problem asking for interval notation. It says: Determine, in interval notation, the values of x for which the series converges. Use "-I" for negative infinity, "I" for infinity. 2. The attempt at a solution I know that -x+5 > 1, but how to I turn this into interval notation? I'm stuck on every one of these problems on my math hw, unfortunately. Please advise if you can. Thanks in advance.