Factorials are large.
Calculus
Level
2
Is the following summation larger than 4?
\[ \frac{ 1!} { 2!} + \frac{ 2!} { 3!} + \frac{ 3!} { 4!} + \ldots + \frac{ 99!} { 100!} \]
by
Adam Phúc Nguyễn