New Year Countdown - 3

Algebra Level 4

Find the sum of the series :-

\(\frac{3}{1!} + \frac{5}{2!} + \frac{9}{3!} + \frac{15}{4!} + \frac{23}{5!} + .......∞.\)

=> Here \(n! = n(n-1)(n-2)(n-3).....1.\)

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