What is defined as a sequence where each term is found by adding or subtracting a constant value?

An arithmetic progression is defined as a sequence of numbers in which each term is generated by adding or subtracting a fixed, constant value, known as the common difference, to the previous term. For example, in the sequence 2, 5, 8, 11, each term is obtained by adding 3 to the term before it. This property of having a consistent difference between consecutive terms is what characterizes an arithmetic progression.

In contrast, a geometric progression involves each term being found by multiplying or dividing by a constant value, which does not apply in this scenario. Similarly, an exponential sequence involves terms that are determined by raising a constant base to a variable exponent, and a harmonic sequence is based on the reciprocals of an arithmetic progression. These distinctions clarify why the definition provided aligns specifically with arithmetic progression.