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Which of the following nth-term rules represents the sequence of odd natural numbers 1, 3, 5, 7, ...?

Answer and explanation

Correct answer: \(2n-1\)

Putting \(n=1,2,3\) in \(2n-1\) gives 1, 3, and 5, so it generates the odd natural numbers. In contrast, \(2n\) gives 2, 4, and 6, which are even numbers. Exam tip: verify a rule using the first three terms.

Related tags

Nth TermSequencesArithmetic ProgressionOdd NumbersClass 9 MathematicsSequences And ProgressionsMathematicsClass 9 Mcq

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