Question 111
Compute
$$
\sum_{n=1}^{\infty} \frac{1}{n \cdot (n+1) \cdot (n+1)!}
$$
$$
\sum_{n=1}^{\infty} \frac{1}{n \cdot (n+1) \cdot (n+1)!}
$$
MathNet 2007-part-03 — 185 problems (EN–VI) Question 111
Math Olympiad Vault · MathNet 2007-part-03 — 185 problems (EN–VI)