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In the sequence (3,8,13,18,\ldots), what is the value of (a+2d)?

Answer and explanation

Correct answer: 13

In this AP, the first term is \(a=3\) and the common difference is \(d=8-3=5\). Therefore, \(a+2d=3+2(5)=13\). Hence, 13 is the correct option. The number 8 is the second term, whereas \(a+2d\) represents the third term of an AP. Exam tip: use \(a+(n-1)d\) to find the \(n\)th term.

Related tags

Arithmetic ProgressionCommon DifferenceThird TermAp FormulaClass 10 MathematicsIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)

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