Answer it might be me just being stupid but i was given a question on sequences. i was given the sequence 2,8,14,20. ive been taught to use the dn + ( a - d) method. so the first number in the sequence is 2 so that's a and the difference is 6 so that's d. so it is 6n + ( 2 - 6) which is 6n - 4? that's what i got anyways. on my homework sheet it is telling me that n, the difference, is 4n? ! really confused somebody : )