यदि \(a_1=2\), \(a_2=7\) और \(a_n=a_{n-1}+a_{n-2}+n\) है तो \(a_4\) क्या होगा?
If \(a_1=2\), \(a_2=7\), and \(a_n=a_{n-1}+a_{n-2}+n\), what is \(a_4\)?
Explanation opens after your attempt
C. (23)
Concept
\(a_3=7+2+3=12\) and \(a_4=12+7+4=23\). Exam tip: add current (n) with the previous two terms.
Why this answer is correct
The correct answer is C. (23). \(a_3=7+2+3=12\) and \(a_4=12+7+4=23\). Exam tip: add current (n) with the previous two terms.
Exam Tip
\(a_3=7+2+3=12\) और \(a_4=12+7+4=23\) है। पिछले दो पदों के साथ वर्तमान (n) जोड़ें।
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