Inspired by Paul Patawaran

Calculus Level 4

n=11n(n+1)(n+1)!=?\large\displaystyle\sum_{n=1}^{\infty} \frac{1}{n(n+1)(n+1)!} = \, ?


Notation: !! is the factorial notation. For example, 8!=1×2×3××88! = 1\times2\times3\times\cdots\times8 .

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