A) a, is divergent s-a ; n=1 2, k=1 a s, s = yss 1 s s 1 1 s s2 + + sn- s + t s t s asa, is divergent lim a, = 0 n-0 - = 0 s lim n-0 1 lim t, = lim s s a n-0 sh

A) a, is divergent S-a ; n=1 2, k=1 a S, S = ySS 1 S S 1 1 S S2 + + Sn- S + t S t S Asa, is divergent lim a, = 0 n-0 - = 0 S lim n-0 1 lim t, = lim S S a n-0 Shot Shot on Y91 2021 oA 19 11.10........ ,please explain this line???????????