अनुक्रम \(6,12,20,30,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(6,12,20,30,\ldots\)?
Explanation opens after your attempt
A. \(a_n=n^2+3n+2\)
Concept
\(n^2+3n+2\) gives (6,12,20,30). In exams test options by putting (n=1,2,3).
Why this answer is correct
The correct answer is A. \(a_n=n^2+3n+2\). \(n^2+3n+2\) gives (6,12,20,30). In exams test options by putting (n=1,2,3).
Exam Tip
\(n^2+3n+2\) से (6,12,20,30) मिलते हैं। परीक्षा में (n=1,2,3) रखकर विकल्प जाँचें।
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