यदि \(a_1=1\), \(a_2=4\) और \(a_n=a_{n-1}+a_{n-2}\) है तो \(a_4\) क्या होगा?
If \(a_1=1\), \(a_2=4\), and \(a_n=a_{n-1}+a_{n-2}\), what is \(a_4\)?
Explanation opens after your attempt
C. (9)
Concept
The terms are (1,4,5,9), so \(a_4=9\). Exam tip: add the correct pair of previous terms.
Why this answer is correct
The correct answer is C. (9). The terms are (1,4,5,9), so \(a_4=9\). Exam tip: add the correct pair of previous terms.
Exam Tip
पद (1,4,5,9) हैं इसलिए \(a_4=9\) है। पिछले दो पदों की सही जोड़ी जोड़ें।
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