Hi Brian,

When you discussed the boundary points of convergence interval, whenever x=-2,or x=2, we end up with with the same term (it seems not affect the result). What do you think

Best, Han

HANHONG (talk)19:21, 13 February 2018

Hi Han,

You are right, thanks for telling me about this!


BRIANCHAN (talk)20:03, 13 February 2018