यदि \(a_1=1\), \(a_2=2\) और \(a_n=3a_{n-1}-2a_{n-2}+1\) है तो \(a_4\) क्या होगा?
If \(a_1=1\), \(a_2=2\), and \(a_n=3a_{n-1}-2a_{n-2}+1\), what is \(a_4\)?
Explanation opens after your attempt
A. (7)
Concept
\(a_3=3\times2-2\times1+1=5\) and \(a_4=3\times5-2\times2+1=12\). The correct option should include (12).
Why this answer is correct
The correct answer is A. (7). \(a_3=3\times2-2\times1+1=5\) and \(a_4=3\times5-2\times2+1=12\). The correct option should include (12).
Exam Tip
\(a_3=3\times2-2\times1+1=5\) और \(a_4=3\times5-2\times2+1=12\) है। सही विकल्प में (12) होना चाहिए।
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