यदि \(a_1=3\), \(a_2=9\) और \(a_n=a_{n-1}+a_{n-2}+7\) है तो \(a_5\) क्या होगा?
If \(a_1=3\), \(a_2=9\), and \(a_n=a_{n-1}+a_{n-2}+7\), what is \(a_5\)?
Explanation opens after your attempt
A. (61)
Concept
The terms are (3,9,19,35,61), so \(a_5=61\). Exam tip: also add (7) with the previous two terms.
Why this answer is correct
The correct answer is A. (61). The terms are (3,9,19,35,61), so \(a_5=61\). Exam tip: also add (7) with the previous two terms.
Exam Tip
पद (3,9,19,35,61) हैं इसलिए \(a_5=61\) है। पिछले दो पदों के साथ (7) भी जोड़ें।
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