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If (8,8+s,8+2s,\ldots) is an arithmetic progression, what is its common difference?

Answer and explanation

Correct answer: s

The common difference of an arithmetic progression is the difference between two consecutive terms. Here, \((8+s)-8=s\). Also, \((8+2s)-(8+s)=s\), so the common difference is \(s\). The expression \(2s\) is the total added part in the third term, not the difference between consecutive terms. Exam tip: find the common difference by subtracting the preceding term from the next term.

Related tags

Arithmetic ProgressionCommon DifferenceAlgebraic SequencesClass 10 MathematicsAp IntroductionIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)

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