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What will be the sixth term in (-18,-12,-6,0,\ldots)?

Answer and explanation

Correct answer: \(12\)

This is an arithmetic progression because \(6\) is added to each successive term. Here, the first term is \(a=-18\) and the common difference is \(d=6\). Therefore, \(a_6=a+5d=-18+5\times6=12\). Hence, the sixth term is \(12\). Option \(6\) is the fifth term, so it is a close but incorrect distractor. Exam tip: while finding the \(n\)th term, use \(a_n=a+(n-1)d\) carefully.

Related tags

Arithmetic ProgressionCommon DifferenceNth TermClass 10 MathematicsAp SequenceIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)

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