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Which of the following is a decreasing arithmetic progression?

Answer and explanation

Correct answer: (50, 45, 40, 35, …)

A decreasing arithmetic progression must satisfy two conditions: its terms must become smaller, and its common difference must be a constant negative number. In option A, the successive differences are 45 − 50 = −5, 40 − 45 = −5, and 35 − 40 = −5. Thus both conditions hold, so option A is correct. Option B has a constant ratio of 2 rather than a constant difference, making it geometric. Option C has common difference 0, so it is constant rather than decreasing. Option D consists of successive squares; its differences are 3, 5, and 7, which are not constant. Hence only option A is a decreasing arithmetic progression.

Related tags

Decreasing Arithmetic ProgressionNegative Common DifferenceSequencesIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)Arithmetic Progressions ApMathematics

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