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How many terms are there up to (41) in the arithmetic progression (5,9,13,\ldots)?

Answer and explanation

Correct answer: 10

Here, the first term is 5 and the common difference is 4. Using \(a_n=a+(n-1)d\), we get \(41=5+(n-1)\times4\). Thus, \(n-1=9\), so \(n=10\). Option 9 is incorrect because 37 is the ninth term. Exam tip: To find the number of terms up to a given last term, equate that term to \(a_n\) and solve for \(n\).

Related tags

Arithmetic ProgressionSequence TermsCommon DifferenceNth TermClass 9 MathematicsSequences And ProgressionsMathematicsClass 9 Mcq

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