sum n=1 oo [(-1)^n / n^2/3 + 1 / n^3/2]
so the second part is easy. p series 3/2>1 converges
but i cant get the first part? im too familiar with the alternating series test
((-1)^n) 1 / n^2/3
do you just try to find the limit of that by doing
lim n->oo 1 / n^2/3 = 1/oo = 0?