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In the AP (-47,-31,-15,\ldots), what is the first term greater than (500)?

Answer and explanation

Correct answer: 513

Here, the first term is \(a=-47\) and the common difference is \(d=16\). Thus, \(a_n=-47+16(n-1)=16n-63\). For \(a_n>500\), \(16n-63>500\), so \(n>35.1875\). The smallest integer value is \(n=36\), giving \(a_{36}=513\). Option 497 is not greater than 500. Exam tip: For “greater than,” use the next integer term satisfying the inequality.

Related tags

Arithmetic ProgressionNth TermInequalitiesClass 10 MathematicsCommon DifferenceFinding The $N$Th Term Of An ApFinding The N Th Term Of An ApArithmetic Progressions (Ap)

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