Σ_(k=1) ^n (n/(n^2 +k)) (1/n)Σ_(k=1 ) ^n cos((1/( (√(n+k))))) convergente?


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Question Number 160545 by alcohol last updated on 01/Dec/21

$\underset{k = 1}{\sum^{n}} \frac{n}{n^{2} + k}$ $\frac{1}{n} \underset{k = 1}{\sum^{n}} c o s (\frac{1}{\sqrt{n + k}})$ $c o n v e r g e n t e ?$
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