In this lesson, you'll learn how to find the sum of arithmetic progressions using a famous result. By rearranging the order of the elements in the addition, we can write a general formula for the sum of an arithmetic progression. The formula is s sub n equals a sub 1 plus a sub n times n or two. By applying this formula, you can solve problems involving sequences that start on an arbitrary number and increase by a constant natural number.
Learn how to find the sums of several arithmetic progressions using a famous result.