यदि \(a_n=n^2+4n\) है तो (200) से छोटे कितने पद होंगे?
If \(a_n=n^2+4n\), how many terms will be less than (200)?
Explanation opens after your attempt
C. (12)
Concept
\(a_{12}=192\) and \(a_{13}=221\), so (12) terms are less than (200). Exam tip: check the two terms near the boundary.
Why this answer is correct
The correct answer is C. (12). \(a_{12}=192\) and \(a_{13}=221\), so (12) terms are less than (200). Exam tip: check the two terms near the boundary.
Exam Tip
\(a_{12}=192\) और \(a_{13}=221\) है इसलिए (12) पद (200) से छोटे हैं। सीमा के पास वाले दो पद जरूर जाँचें।
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