convergence of series: (-1)^(n+1)(lnn/n^2); sin(n pi/2)/n!

[mymath]

determine if the ff power series are absolutely convergent, conditionally convergent or divergent

1. sigma (-1)[sup:38govgda]n+1[/sup:38govgda] ( ln n/n[sup:38govgda]2[/sup:38govgda])

2. sigma sin(n pi / 2) / n!

 

[Deleted member 4993]

determine if the ff power series are absolutely convergent, conditionally convergent or divergent

1. sigma (-1)[sup:3crzmtxw]n+1[/sup:3crzmtxw] ( ln n/n[sup:3crzmtxw]2[/sup:3crzmtxw])

2. sigma sin(n pi / 2) / n!

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