यदि \(a_1=4\) और (a_{n+1}=a_n+n(n+1)+2) है तो \(a_4\) क्या होगा?
If \(a_1=4\) and (a_{n+1}=a_n+n(n+1)+2), what is \(a_4\)?
Explanation opens after your attempt
B. (30)
Concept
The added values are (4,8,14), so \(a_4=30\). Exam tip: calculate the product and then add (2).
Why this answer is correct
The correct answer is B. (30). The added values are (4,8,14), so \(a_4=30\). Exam tip: calculate the product and then add (2).
Exam Tip
जुड़ने वाले मान (4,8,14) हैं इसलिए \(a_4=30\) है। गुणनफल निकालकर (2) जोड़ें।
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