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If the nth term of a sequence is \(a_n=pn+q\), where \(p\) and \(q\) are constants, what type of sequence is it?

Answer and explanation

Correct answer: An AP with common difference \(p\)

The difference is \(a_{n+1}-a_n=[p(n+1)+q]-(pn+q)=p\), which is constant. Hence it is an AP; \(q\) affects the first term, not the common difference. Exam tip: subtract consecutive terms to identify an AP.

Related tags

Arithmetic ProgressionNth TermCommon DifferenceSequence ClassificationLinear FormFinding The $N$Th Term Of An ApFinding The N Th Term Of An ApArithmetic Progressions (Ap)

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