What is an arithmetic sequence?

arithmetic sequence  Arithmetic Progression · The formula for finding the n-th term of an AP is: · Where · a = First term · d = Common difference · n = number of terms · = nth term  The general term of an arithmetic sequence can be written in terms of its first term a1, common difference d, and index n as follows: an=a1+d

Another formula for the sum of an arithmetic series · The first term is 5, so a 1 = 5 · To find the common difference d , subtract one of the terms from If the first term of the sequence is a and the common difference is d, then the arithmetic sequence can be written as a, a+d, a+2d, a+3d, …, a+d, …

Find the Sum of the First n Terms of an Arithmetic Sequence As with the general sequences, it is often useful to find the sum of an arithmetic Sample Problem 1 Find the 5th term and 11th terms of the arithmetic sequence with Ad for