I'm using the ratio test because there are factorials but I'm a little stuck on whether or not to factor out
The Attempt at a Solution
lim 2n+1(n+1)!/(n+3)!*(n+2)!/2n(n)! After I set it up here I'm not sure of how to factor out the factorials. would it end up looking like 2(n+1)(n+2)/(n+3) ?