Find a formula for 1/1.2 + 1/2.3 + ... + 19n + 1). (Enter the fraction in the form a/b). For n = 1, 1/1.2 + 1/2.3 + ... 1(n + 1) = For n = 2, 1/1.2 +1/2.3 + ... + 1(n +1) = For n = 3, 1/1.2 + 1/2.3 + ... 1(n + 1) = For n = 4, 1/1.2 + 1/2.3 + ... 1(n + 1) = For n = 5, 1/1.2 + 1/2.3 + ... 1(n + 1) = Identify the formula for the given series, derived from the values obtained for n = 1 to 5. (n + 1) n/(n - 1) (n - 1)/(n + 1) n/(n + 1) (n + 2)/(n + 1)