यदि \(a_1=1\), \(a_2=4\) और \(a_n=a_{n-1}+2a_{n-2}\) है तो \(a_6\) क्या होगा?
If \(a_1=1\), \(a_2=4\), and \(a_n=a_{n-1}+2a_{n-2}\), what is \(a_6\)?
Explanation opens after your attempt
B. (54)
Concept
The terms are (1,4,6,14,26,54), so \(a_6=54\). Exam tip: multiply \(a_{n-2}\) by (2) in the two-term rule.
Why this answer is correct
The correct answer is B. (54). The terms are (1,4,6,14,26,54), so \(a_6=54\). Exam tip: multiply \(a_{n-2}\) by (2) in the two-term rule.
Exam Tip
पद (1,4,6,14,26,54) हैं इसलिए \(a_6=54\) है। दो-पद नियम में \(a_{n-2}\) को (2) से गुणा करें।
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