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Which of the following sequences is not an AP?

Answer and explanation

Correct answer: (1, 4, 7, 11)

In an arithmetic progression, the difference between every pair of consecutive terms must be the same. In option D, the consecutive differences are 3, 3, and 4, which are not equal; hence it is not an AP. In options A, B, and C, the common differences are 3, 4, and 0 respectively, all constant. Exam tip: check every consecutive difference, not only the first two.

Related tags

Arithmetic ProgressionCommon DifferenceSequenceIdentify ApClass 10 MathematicsIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)

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