Definition Of Arithmetic Sequence

Arithmetic sequence is a sequence of numbers that has a constant difference between every two consecutive terms.

In other words, arithmetic sequence is a sequence of numbers in which each term except the first term is the result of adding the same number, called the common difference, to the preceding term.

Examples of Arithmetic Sequence

The sequence 5, 11, 17, 23, 29, 35 . . . is an arithmetic sequence, because the same number 6 (i.e. the common difference) is added to each term of the sequence to get the succeeding term.

Arithmetic series is the indicated sum of the terms of an arithmetic sequence.

Example of Arithmetic Series

The sequence 5, 11, 17, 23, 29, 35 is an arithmetic sequence.
5 + 11 + 17 + 23 + 29 + 35 is the corresponding arithmetic series.

Solved Example on Arithmetic Sequence

Ques:

Find the next four terms of the given arithmetic sequence. 7, 4, 1, - 2, - 5 . . .

Choices:

A. - 3, - 3, - 3, - 3
B. - 8, -5, -2, 1
C. - 8, - 11, - 14, - 17
D. 8, 11, 14, 17