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find-n-0-t-3n-3n-




Question Number 29030 by abdo imad last updated on 03/Feb/18
find  Σ_(n=0) ^∞     (t^(3n) /((3n)!)) .
$${find}\:\:\sum_{{n}=\mathrm{0}} ^{\infty} \:\:\:\:\frac{{t}^{\mathrm{3}{n}} }{\left(\mathrm{3}{n}\right)!}\:. \\ $$

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