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If (r-6, r-1, r+4,\ldots) is an arithmetic progression, what is (d)?

Answer and explanation

Correct answer: \(5\)

In an arithmetic progression, the common difference is the difference between consecutive terms. Here, \((r-1)-(r-6)=5\) and \((r+4)-(r-1)=5\). Since both differences are equal, \(d=5\). \(r+5\) may describe a term expression, but it is not the common difference. Exam tip: subtract any term from the next term to find \(d\).

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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