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Class 9 Mathematics Sequences and Progressions nth termEasy

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In the sequence (2,6,12,20,\ldots), which term is (42)?

Answer and explanation

Correct answer: sixth term

Its rule is (a_n=n(n+1)), and (6\times7=42). In exams, match the given term with the rule to find the term number.

Related tags

Sequences Progressions Nth-Term Class-9 Easy Nth Term Sequences And Progressions Mathematics

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