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Is (12, 24, 36, 48, ...) an arithmetic progression?

Answer and explanation

Correct answer: Yes, common difference is 12

An arithmetic progression is a sequence in which the difference between every pair of consecutive terms is constant. For the given sequence, 24 − 12 = 12, 36 − 24 = 12, and 48 − 36 = 12. Since the same difference occurs at every step, it is an arithmetic progression with common difference 12. Therefore option A is correct. Option B incorrectly treats the second term as the difference. Option C confuses an arithmetic progression with a constant sequence; its terms do not need to be equal, only their consecutive differences must be equal. Option D is false because the sequence increases by 12 rather than decreases. The repeated subtraction check is sufficient to establish the classification.

Related tags

Arithmetic-ProgressionCommon-DifferenceSequencesClassificationSequences And ProgressionsMathematicsArithmetic ProgressionClass 9 Mcq

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