- #1

- 14

- 0

**Hi, I don't undestand this limits to infinity.**

**[ (2n)! / (n!)^2 ]^1/n**

and

[ ( n^n + 2^n ) / (n! + 3^n) ]^1/n

and

[ ( n^n + 2^n ) / (n! + 3^n) ]^1/n

**I've absolutely no idea how the first one can be "4", and the seconda one "e". Assuming (1 + 1/n)^n = e I don't see how can I go from that form to this one. Any hint is appreciated.**