यदि \(a_1=2\), \(a_2=8\) और \(a_n=a_{n-1}+2a_{n-2}+n\) है तो \(a_4\) क्या होगा?
If \(a_1=2\), \(a_2=8\), and \(a_n=a_{n-1}+2a_{n-2}+n\), what is \(a_4\)?
Explanation opens after your attempt
C. (35)
Concept
\(a_3=8+2\times2+3=15\) and \(a_4=15+2\times8+4=35\). Exam tip: do not forget to add current (n).
Why this answer is correct
The correct answer is C. (35). \(a_3=8+2\times2+3=15\) and \(a_4=15+2\times8+4=35\). Exam tip: do not forget to add current (n).
Exam Tip
\(a_3=8+2\times2+3=15\) और \(a_4=15+2\times8+4=35\) है। वर्तमान (n) भी जोड़ना न भूलें।
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