Don't know where it origionally came from but I stole it from fbook, they don't need it. Image appears to move but actually doesn't, stare in one spot to make it stop, slowly glance over it to make it

Arithmetic sequence is a sequence of terms with a common difference (denoted as d) between consecutive terms. For example, 2, 4, 6, 8, 10, ... is a sequence with 2 as the common difference. To get the