अनुक्रम \(5,12,23,38,57,\ldots\) के लिए सही सामान्य पद कौन सा है?
Which is the correct general term for the sequence \(5,12,23,38,57,\ldots\)?
Explanation opens after your attempt
D. \(a_n=2n^2+n+2\)
Concept
\(2n^2+n+2\) gives the starting terms (5,12,23). Exam tip: check at least three terms before choosing a formula.
Why this answer is correct
The correct answer is D. \(a_n=2n^2+n+2\). \(2n^2+n+2\) gives the starting terms (5,12,23). Exam tip: check at least three terms before choosing a formula.
Exam Tip
\(2n^2+n+2\) से शुरुआती पद (5,12,23) मिलते हैं। सूत्र चुनते समय कम से कम तीन पद जाँचें।
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