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What is the common difference of (2k,2k+3,2k+6,2k+9,\ldots)?

Answer and explanation

Correct answer: \(3\)

To find the common difference, subtract a term from the term immediately after it. Here, \((2k+3)-2k=3\) and \((2k+6)-(2k+3)=3\). Thus, the difference between every pair of consecutive terms is \(3\). \(2k+3\) is the second term, not the common difference. Exam tip: In an AP, check the differences of at least two consecutive pairs of terms to confirm that they are equal.

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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