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If the (37)th term of the AP (w-15,w-4,w+7,\ldots) is (677), what is the value of (w)?

Answer and explanation

Correct answer: 296

The difference between consecutive terms is \((w-4)-(w-15)=11\), so \(d=11\) and the first term is \(a=w-15\). Using \(a_n=a+(n-1)d\), we get \(677=(w-15)+36\times11=w+381\). Hence, \(w=296\). If \(w=300\), the 37th term would be 681, not 677. Exam tip: for the \(n\)th term of an AP, use \(n-1\) common differences.

Related tags

Arithmetic ProgressionNth TermAlgebraic VariableClass 10 MathematicsFinding The $N$Th Term Of An ApFinding The N Th Term Of An ApArithmetic Progressions (Ap)Arithmetic Progressions Ap

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