यदि \(a_1=2\) और \(a_{n+1}=a_n+n^2+n+1\) है तो \(a_3\) क्या होगा?
If \(a_1=2\) and \(a_{n+1}=a_n+n^2+n+1\), what is \(a_3\)?
Explanation opens after your attempt
B. (12)
Concept
The terms are (2,5,12), so \(a_3=12\). Exam tip: calculate \(n^2+n+1\) correctly before adding.
Why this answer is correct
The correct answer is B. (12). The terms are (2,5,12), so \(a_3=12\). Exam tip: calculate \(n^2+n+1\) correctly before adding.
Exam Tip
पद (2,5,12) हैं इसलिए \(a_3=12\) है। \(n^2+n+1\) को सही निकालकर जोड़ें।
Login to save your score, XP, coins and progress.
