Question

s the sequence arithmetic? If so, identify the common difference.

13, 20, 27, 34, ...

Answer 1

adding seven every time

Answer 2

you add 7 each time

Answer 3

subtract the nth term by the n-1th term. ie if n=20 the n-1=13 so subtract and you get 7 as the common difference. rather then just asking the answer ask how to get it so you can understand the process.