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Question Number 31416 by abdo imad last updated on 08/Mar/18
find the value of  Σ_(n=2) ^∞  (1/(n^4 −1))  .
$${find}\:{the}\:{value}\:{of}\:\:\sum_{{n}=\mathrm{2}} ^{\infty} \:\frac{\mathrm{1}}{{n}^{\mathrm{4}} −\mathrm{1}}\:\:. \\ $$

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