यदि \(a_1=2\) और \(a_{n+1}=a_n+n^2+2n\) है तो \(a_5\) क्या होगा?
If \(a_1=2\) and \(a_{n+1}=a_n+n^2+2n\), what is \(a_5\)?
Explanation opens after your attempt
D. (50)
Concept
The added values are (3,8,15,24), and after adding them \(a_5=50\). Exam tip: write values of \(n^2+2n\) separately.
Why this answer is correct
The correct answer is D. (50). The added values are (3,8,15,24), and after adding them \(a_5=50\). Exam tip: write values of \(n^2+2n\) separately.
Exam Tip
जुड़ने वाले मान (3,8,15,24) हैं और योग के बाद \(a_5=50\) मिलता है। पहले \(n^2+2n\) के मान अलग लिखें।
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