यदि \(a_1=9\) और \(a_{n+1}=a_n+2a_n\) है तो \(a_3\) क्या होगा?
If \(a_1=9\) and \(a_{n+1}=a_n+2a_n\), what is \(a_3\)?
Explanation opens after your attempt
D. (81)
Concept
This rule is the same as \(a_{n+1}=3a_n\). The terms are (9,27,81), so \(a_3=81\).
Why this answer is correct
The correct answer is D. (81). This rule is the same as \(a_{n+1}=3a_n\). The terms are (9,27,81), so \(a_3=81\).
Exam Tip
यह नियम \(a_{n+1}=3a_n\) के समान है। पद (9,27,81) हैं इसलिए \(a_3=81\) है।
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