यदि \(a_1=2\) और (a_{n+1}=(n+1)a_n+n) है तो \(a_4\) क्या होगा?
If \(a_1=2\) and (a_{n+1}=(n+1)a_n+n), what is \(a_4\)?
Explanation opens after your attempt
C. (71)
Concept
\(a_2=5\), \(a_3=17\), and \(a_4=71\). Exam tip: the multiplier (n+1) changes at every step.
Why this answer is correct
The correct answer is C. (71). \(a_2=5\), \(a_3=17\), and \(a_4=71\). Exam tip: the multiplier (n+1) changes at every step.
Exam Tip
\(a_2=5\), \(a_3=17\) और \(a_4=71\) है। गुणक (n+1) हर चरण में बदलता है।
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