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If \(a_n=\frac{n+3}{2}\), what is the value of \(a_7\)?

Answer and explanation

Correct answer: 5

Given \(a_n=\frac{n+3}{2}\). To find \(a_7\), substitute \(n=7\): \(a_7=\frac{7+3}{2}=\frac{10}{2}=5\). Therefore, 5 is the correct option. The value 4 would result only if the numerator were 8, so it is not correct here. Exam tip: for an nth-term formula, substitute the given value of \(n\) before simplifying.

Related tags

Sequences And ProgressionsNth TermSubstitutionClass 9 MathematicsAlgebraic SequencesMathematicsClass 9 Mcq

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