An arithmetic sequence is an ordered list of numbers that increases / decreases by a fixed difference across each successive term. We call this difference, the Common Difference.
The nth term in this sequence = [First Term] + (n - 1) × [Common Difference]
Explore!
Use the applet below to explore the sum of an arithmetic progression.
The general formula for the sum of an A.P = [# of terms] × ([1st Term] + [Last Term]) ÷ 2