How To Find The Sum Of An Arithmetic Sequence 10 Steps
To determine whether you have an arithmetic sequence, find the difference between the first few and the last few numbers. Ensure that the difference is always the same. For example, the series 10, 15, 20, 25, 30 is an arithmetic sequence, because the difference between each term is constant (5). For example, if you are calculating the sum of the sequence 10, 15, 20, 25, 30, n=5{\displaystyle n=5}, since there are 5 terms in the sequence....