यदि \(a_1=3\), \(a_2=4\) और \(a_n=a_{n-1}+a_{n-2}+2n\) है तो \(a_4\) क्या होगा?
If \(a_1=3\), \(a_2=4\), and \(a_n=a_{n-1}+a_{n-2}+2n\), what is \(a_4\)?
Explanation opens after your attempt
B. (25)
Concept
\(a_3=13\) and \(a_4=13+4+8=25\). Exam tip: use the correct current (n) in a two-term rule.
Why this answer is correct
The correct answer is B. (25). \(a_3=13\) and \(a_4=13+4+8=25\). Exam tip: use the correct current (n) in a two-term rule.
Exam Tip
\(a_3=13\) और \(a_4=13+4+8=25\) है। दो-पद नियम में वर्तमान (n) सही रखें।
Login to save your score, XP, coins and progress.
