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Question Number 33300 by abdo imad last updated on 14/Apr/18
$${find}\:{the}\:{value}\:{of}\:\:\:\sum_{{n}=\mathrm{0}} ^{\infty} \:\:\:\frac{\left(−\mathrm{1}\right)^{{n}} }{\mathrm{4}{n}\:+\mathrm{3}}\:. \\ $$