Question

How do you find the common difference of an arithmetic sequence? Ex. 28,18,8,-2

Answer 1

To find the common difference of an arithmetic sequence, we compute the difference of an element of the sequence and its predecessor.

Example: Given the sequence 28, 18, 8, -2, the common difference is:

`\begin{gathered} 18-28=-10, \\ 8-18=-10, \\ -2-8=-10. \end{gathered}`