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n-1-1-n-1-H-n-n-2-




Question Number 134619 by payamnazerian last updated on 05/Mar/21
           Σ_(n=1) ^∞ (((−1)^(n−1) H_n )/n^2 )=???
$$\:\:\:\: \\ $$$$\:\:\:\:\:\underset{{n}=\mathrm{1}} {\overset{\infty} {\sum}}\frac{\left(−\mathrm{1}\right)^{\boldsymbol{{n}}−\mathrm{1}} \boldsymbol{{H}}_{{n}} }{\boldsymbol{{n}}^{\mathrm{2}} }=??? \\ $$

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