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Which of the following sequences will always have a constant difference between consecutive terms?

Answer and explanation

Correct answer: \(a_n=5n-2\)

For \(a_n=5n-2\), \(a_{n+1}-a_n=[5(n+1)-2]-(5n-2)=5\), which is constant. Hence it is an arithmetic progression. In \(n^2+1\), the difference changes. Exam tip: check consecutive differences.

Related tags

SequencesArithmetic ProgressionConstant DifferenceNth TermClass 9 MathematicsSequences And ProgressionsMathematicsClass 9 Mcq

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