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If an arithmetic progression (AP) has first term \(a\) and common difference \(d\), which expression represents its \(n\)th term?

Answer and explanation

Correct answer: \(a_n=a+(n-1)d\)

In an AP, the common difference is added \(n-1\) times from the first term to reach the \(n\)th term, so \(a_n=a+(n-1)d\). Option B adds one extra \(d\). Exam tip: substitute \(n=1\); the result must be \(a\).

Related tags

Arithmetic ProgressionNth TermCommon DifferenceAp FormulaClass 10 MathematicsFinding The $N$Th Term Of An ApFinding The N Th Term Of An ApArithmetic Progressions (Ap)

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