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Is the sequence (4,8,13,19,\ldots) an arithmetic progression or not?

Answer and explanation

Correct answer: No, because the differences between consecutive terms are not equal

The differences between consecutive terms are 8−4=4, 13−8=5, and 19−13=6. In an arithmetic progression, the difference between every pair of consecutive terms must be constant. Since these differences are 4, 5, and 6, the sequence is not an arithmetic progression. Merely having increasing or positive terms is not sufficient. Exam tip: calculate consecutive differences to test whether a sequence is an AP.

Related tags

Arithmetic-ProgressionCommon-DifferenceSequencesClass-10Ap-CheckIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)

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