Post your work to see whats wrong with it.
PS: the Root Test is better for this one.
and remember that: .
Find the interval of convergence for the following power series:
I used the ratio test first to get my radius of convergence which I got to be 6 but I think this is where I may have messed up. From there I added 6 to and subtracted 6 from 2, which would make my interval (-4,8) but its not right so can anyone help?