To apply the ratio test to the infinite series 0 1. 1 = _ an, the value of n O 2. X= an+1 X = lim n-+ 00 an 0 3. 1 = has to be determined. Compute A for the series 0 41 = E (n!) 2 n 12 (2n)! n=1 O 5. X = 091