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What is (d) in the sequence (6,6.8,7.6,8.4,\ldots)?

Answer and explanation

Correct answer: 0.8

In an arithmetic progression, the common difference \(d\) is the difference between consecutive terms. Here, \(d=6.8-6=0.8\). Checking further, \(7.6-6.8=0.8\) and \(8.4-7.6=0.8\). The value 0.6 would result from incorrect decimal subtraction. Exam tip: find \(d=a_2-a_1\) and verify it using the next pair of terms.

Related tags

Arithmetic ProgressionCommon DifferenceDecimal SubtractionClass 10 MathematicsAp BasicsIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)

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