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Question Number 34691 by math khazana by abdo last updated on 09/May/18 | ||
$${calculate}\:\:\sum_{{n}=\mathrm{3}} ^{\infty} \:\:\:\frac{\mathrm{2}{n}−\mathrm{1}}{{n}^{\mathrm{3}} \:−\mathrm{4}{n}}\:. \\ $$ | ||