यदि \(a_1=1\), \(a_2=3\) और \(a_n=4a_{n-1}-3a_{n-2}\) है तो \(a_4\) क्या होगा?
If \(a_1=1\), \(a_2=3\), and \(a_n=4a_{n-1}-3a_{n-2}\), what is \(a_4\)?
Explanation opens after your attempt
C. (27)
Concept
\(a_3=4\times3-3\times1=9\) and \(a_4=4\times9-3\times3=27\). Exam tip: use both previous terms.
Why this answer is correct
The correct answer is C. (27). \(a_3=4\times3-3\times1=9\) and \(a_4=4\times9-3\times3=27\). Exam tip: use both previous terms.
Exam Tip
\(a_3=4\times3-3\times1=9\) और \(a_4=4\times9-3\times3=27\) है। दोनों पिछले पदों का उपयोग करें।
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