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In the sequence (15,18,21,24,\ldots), what are (a) and (d) respectively?

Answer and explanation

Correct answer: 15 and 3

The first term of the sequence is \(a=15\). The difference between consecutive terms is constant: \(18-15=3\), so the common difference is \(d=3\). Therefore, \((a,d)=(15,3)\), making option A correct. Exam tip: In an AP, \(a\) denotes the first term and \(d\) is the difference between the second and first terms.

Related tags

Arithmetic ProgressionsFirst TermCommon DifferenceSequenceEasyIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)

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