अनुक्रम \(5,17,37,65,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(5,17,37,65,\ldots\)?
Explanation opens after your attempt
B. \(a_n=4n^2+1\)
Concept
\(4n^2+1\) gives (5,17,37,65). In exams check a quadratic rule when second differences are constant.
Why this answer is correct
The correct answer is B. \(a_n=4n^2+1\). \(4n^2+1\) gives (5,17,37,65). In exams check a quadratic rule when second differences are constant.
Exam Tip
\(4n^2+1\) से (5,17,37,65) मिलते हैं। परीक्षा में दूसरे अंतर समान देखकर वर्गीय नियम जाँचें।
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