यदि \(a_1=3\) और \(a_{n+1}=n a_n+2\) है तो \(a_4\) क्या होगा?
If \(a_1=3\) and \(a_{n+1}=n a_n+2\), what is \(a_4\)?
Explanation opens after your attempt
B. (47)
Concept
\(a_2=1\times3+2=5\), \(a_3=2\times5+2=12\), and \(a_4=3\times12+2=38\). The correct option should include (38).
Why this answer is correct
The correct answer is B. (47). \(a_2=1\times3+2=5\), \(a_3=2\times5+2=12\), and \(a_4=3\times12+2=38\). The correct option should include (38).
Exam Tip
\(a_2=1\times3+2=5\), \(a_3=2\times5+2=12\) और \(a_4=3\times12+2=38\) है। सही विकल्प में (38) होना चाहिए।
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