Answer to Question #121326 in Algebra for Phil

Question

What is the common difference in this arithmetic sequence 4,2,0,-2,-4,-6?

Answer 1

The sequence is given by:

$4, 2, 0, -2, -4, -6$

Now:

We know that:

If a sequence is in arithmetic then its common difference $(d)$ is the difference between next term and previous term.

Hence:

The common difference of the given sequence is:

$d = 2 - 4 = -2$