שינויים

<math>\frac{\frac{(2n+2)!}{(n+1)^{2n+2}}}{\frac{(2n)!}{n^{2n}}}=\frac{\frac{(2n+2)!}{(n+1)^{2n+2}}}{\frac{(2n)!\cdot n^2}{n^{2n+2}}}=\frac{(2n+2)!}{(2n)!\cdot n^2}\cdot (\frac{n}{n+1})^{2n+2}=\frac{(2n+2)(2n+1)}{n^2}\cdot(1-\frac{1}{n+1})^{2n+2}=\frac{(2n+2)(2n+1)}{n^2}\cdot ((1-\frac{1}{n+1})^{n+1})^2\rightarrow \frac{4}{e^2}<1