यदि \(a_1=3\), \(a_2=5\) और \(a_n=a_{n-1}+2a_{n-2}\) है तो \(a_5\) क्या होगा?
If \(a_1=3\), \(a_2=5\), and \(a_n=a_{n-1}+2a_{n-2}\), what is \(a_5\)?
Explanation opens after your attempt
C. (31)
Concept
The terms are (3,5,11,21,43), so \(a_5=43\). The correct option should include (43).
Why this answer is correct
The correct answer is C. (31). The terms are (3,5,11,21,43), so \(a_5=43\). The correct option should include (43).
Exam Tip
पद (3,5,11,21,43) नहीं बल्कि \(a_5=43\) होता है। सही विकल्प में (43) होना चाहिए।
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