heres the problem: http://img208.imageshack.us/img208/6449/23355228cp8.png
its known that arctan x is (-pi/2, pi/2) and its domain is (-infinity, infinity)
so the limit is lim x-> infinity arctan x = pi/2
would that be enough to show that the series is convergent? or must i use a series test.
also, could i show this using the squeeze theorem also? between the pi/2's