2.10.120 Number Series

Condition: explore the rows for convergence: 1) \ (\ sum _ {\ mathRm {h} 1}^{\ infty} \ left (\ frac {2 n^{2} +1} {n^{2} +1} \^{2}}}}}}}}}}}}}}}}}}} LF \), 2) \ (\ sum_ {n = 2}^{\ infty} \ frac {(-1)^{n+1}} {\ ln (n+1)} \).