यदि \(a_1=1\), \(a_2=2\) और \(a_n=3a_{n-1}-2a_{n-2}\) है तो \(a_4\) क्या होगा?
If \(a_1=1\), \(a_2=2\), and \(a_n=3a_{n-1}-2a_{n-2}\), what is \(a_4\)?
Explanation opens after your attempt
B. (8)
Concept
\(a_3=3\times2-2\times1=4\) and \(a_4=3\times4-2\times2=8\). Exam tip: use both previous terms in the rule.
Why this answer is correct
The correct answer is B. (8). \(a_3=3\times2-2\times1=4\) and \(a_4=3\times4-2\times2=8\). Exam tip: use both previous terms in the rule.
Exam Tip
\(a_3=3\times2-2\times1=4\) और \(a_4=3\times4-2\times2=8\) है। नियम में दोनों पिछले पदों का उपयोग करें।
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