Exercises
[0FX]Prerequisites:[09N].Note:From the written exam of March 27, 2010..Say for which \(πΌββ\) the series
\[ β_{(m,n)β{\mathbb N}^ 2}\frac{1}{(n+m+1)^πΌ}\quad . \]converges. Then discuss, for \(Nβ₯ 3\), the convergence of
\[ β_{(m_ 1,\ldots m_ N)β{\mathbb N}^ N}\frac{1}{(1+m_ 1+\ldots + m_ N)^πΌ}\quad . \]1