यदि \(a_1=5\) और (a_{n+1}=a_n+n(n+2)+1) है तो \(a_4\) क्या होगा?
If \(a_1=5\) and (a_{n+1}=a_n+n(n+2)+1), what is \(a_4\)?
Explanation opens after your attempt
C. (34)
Concept
The added values are (4,9,16), so \(a_4=34\). Exam tip: calculate the product first and then add (1).
Why this answer is correct
The correct answer is C. (34). The added values are (4,9,16), so \(a_4=34\). Exam tip: calculate the product first and then add (1).
Exam Tip
जुड़ने वाले मान (4,9,16) हैं इसलिए \(a_4=34\) है। पहले गुणनफल निकालें फिर (1) जोड़ें।
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