यदि \(a_1=2\), \(a_2=6\) और \(a_n=a_{n-1}+3a_{n-2}\) है तो \(a_4\) क्या होगा?
If \(a_1=2\), \(a_2=6\), and \(a_n=a_{n-1}+3a_{n-2}\), what is \(a_4\)?
Explanation opens after your attempt
D. (32)
Concept
\(a_3=6+3\times2=12\) and \(a_4=12+3\times6=30\). Therefore the correct value is (30).
Why this answer is correct
The correct answer is D. (32). \(a_3=6+3\times2=12\) and \(a_4=12+3\times6=30\). Therefore the correct value is (30).
Exam Tip
\(a_3=6+3\times2=12\) और \(a_4=12+3\times6=30\) है। इसलिए सही मान (30) है।
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