lim-n-r-1-n-1-3-r-r-k-1-r-2k-1-

Question Number 110919 by Dwaipayan Shikari last updated on 31/Aug/20

\lim_{n \to \infty} (\underset{r = 1}{\sum^{n}} \frac{1}{3^{r} r!} (\underset{k = 1}{\prod^{r}} (2 k - 1)))

Answered by mnjuly1970 last updated on 01/Sep/20