How do I find the common difference of an arithmetic sequence?

1 Answer
Jun 22, 2017

To find out the common difference in an AP you can perform the following simple step.

Explanation:

Subtract the first term of the AP from the second term of the AP.

d = a_2 - a_1

where d = common difference
a_2 = any term other than first term
a_1 = previous term

For example;

In the AP
3 , 9 , 15 , 21 , 27 , 33

Taking a_1 = 3
Taking a_2 = 9

a_2 - a_1 = 9 - 3 = 6

hence , common difference or d = 6

Thanks

I hope this helps