किस अनुक्रम में \(a_3=45\) और \(a_6=1215\) दोनों सही हैं?
Which sequence has both \(a_3=45\) and \(a_6=1215\)?
Explanation opens after your attempt
A. \(5,15,45,135,\ldots\)
Concept
In \(5,15,45,135,405,1215,\ldots\), \(a_3=45\) and \(a_6=1215\). Check each option up to the required positions.
Why this answer is correct
The correct answer is A. \(5,15,45,135,\ldots\). In \(5,15,45,135,405,1215,\ldots\), \(a_3=45\) and \(a_6=1215\). Check each option up to the required positions.
Exam Tip
\(5,15,45,135,405,1215,\ldots\) में \(a_3=45\) और \(a_6=1215\) हैं। विकल्पों में पद-संख्या तक जांच करें।
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