यदि \(a_1=4\) और \(a_{n+1}=a_n+3a_1+n\) है तो \(a_3\) क्या होगा?
If \(a_1=4\) and \(a_{n+1}=a_n+3a_1+n\), what is \(a_3\)?
Explanation opens after your attempt
D. (31)
Concept
\(a_2=4+12+1=17\) and \(a_3=17+12+2=31\). Exam tip: \(a_1\) stays fixed while (n) changes.
Why this answer is correct
The correct answer is D. (31). \(a_2=4+12+1=17\) and \(a_3=17+12+2=31\). Exam tip: \(a_1\) stays fixed while (n) changes.
Exam Tip
\(a_2=4+12+1=17\) और \(a_3=17+12+2=31\) है। \(a_1\) स्थिर रहता है और (n) बदलता है।
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