Question

 $\frac{(N+1)!+n!}{n!}$

Answer 1

$\frac{(n+1)!+n!}{n!} = \frac{(n+1)*n!+n!}{n!} = \frac{n![(n+1)+1]}{n!} =$
:
$=n+1+1=n+2$
: