यदि \(a_1=3\), \(a_2=4\) और \(a_n=3a_{n-1}-a_{n-2}+n\) है तो \(a_4\) क्या होगा?
If \(a_1=3\), \(a_2=4\), and \(a_n=3a_{n-1}-a_{n-2}+n\), what is \(a_4\)?
Explanation opens after your attempt
C. (36)
Concept
\(a_3=3\times4-3+3=12\) and \(a_4=3\times12-4+4=36\). Exam tip: use both previous terms and current (n).
Why this answer is correct
The correct answer is C. (36). \(a_3=3\times4-3+3=12\) and \(a_4=3\times12-4+4=36\). Exam tip: use both previous terms and current (n).
Exam Tip
\(a_3=3\times4-3+3=12\) और \(a_4=3\times12-4+4=36\) है। दोनों पिछले पदों और वर्तमान (n) का उपयोग करें।
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