यदि \(a_n=n^2+6n+5\) है तो कौन सा पद (252) है?
If \(a_n=n^2+6n+5\), which term is (252)?
Explanation opens after your attempt
C. (13)वाँ(13)th
Concept
\(13^2+6\times13+5=252\), so it is the (13)th term. Exam tip: substitute options directly into the formula.
Why this answer is correct
The correct answer is C. (13)वाँ / (13)th. \(13^2+6\times13+5=252\), so it is the (13)th term. Exam tip: substitute options directly into the formula.
Exam Tip
\(13^2+6\times13+5=252\) इसलिए यह (13)वाँ पद है। विकल्पों को सीधे सूत्र में रखकर जाँचें।
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