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If (a_n=5n+8), what is the value of (a_{26})?

Answer and explanation

Correct answer: 138

Given \(a_n=5n+8\). To find the 26th term, substitute \(n=26\): \(a_{26}=5\times26+8=130+8=138\). Therefore, 138 is correct. The value 136 would result from incorrectly adding 6 instead of 8. Exam tip: substitute the term number carefully for \(n\) in the direct formula.

Related tags

Arithmetic ProgressionNth TermSequence FormulaClass 10 MathematicsSubstitutionFinding The $N$Th Term Of An ApFinding The N Th Term Of An ApArithmetic Progressions (Ap)

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