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What is the value of (d) in the sequence (56,51,46,41,\ldots)?

Answer and explanation

Correct answer: \(-5\)

In an arithmetic progression, the common difference is \(d=a_2-a_1\). Here, \(d=51-56=-5\), so each successive term is 5 less than the preceding term. \(5\) is only the magnitude of the decrease; the common difference must be negative. Exam tip: always subtract the first of two consecutive terms from the second.

Related tags

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

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