This sequence is defined by giving the first term (a1 = 6), and telling you how to find any term by using the previous term ( a(n+1) = 1 + 1/a(n) ). We already know the first term is 6. The second term is then a2 = 1 + 1/6 = 7/6. The third term uses the second term. a3 = 1 + 1/(7/6) = 13/7. I'll leave the 4th term for you to find, but you can check your answer by confirming the 5th term is 33/20.