यदि \(a_1=2\) और \(a_{n+1}=a_n+n^2+n+1\) है तो \(a_4\) क्या होगा?
If \(a_1=2\) and \(a_{n+1}=a_n+n^2+n+1\), what is \(a_4\)?
Explanation opens after your attempt
B. (23)
Concept
The terms are (2,5,12,25), so \(a_4=25\). The correct option should include (25).
Why this answer is correct
The correct answer is B. (23). The terms are (2,5,12,25), so \(a_4=25\). The correct option should include (25).
Exam Tip
पद (2,5,12,25) नहीं बल्कि \(a_4=25\) है। सही विकल्प में (25) होना चाहिए।
Login to save your score, XP, coins and progress.
