गुणोत्तर श्रेणी \(15,45,135,\ldots\) में \(a_8\) क्या है?
What is \(a_8\) in the geometric progression \(15,45,135,\ldots\)?
Explanation opens after your attempt
A. (32805)
Concept
\(a_8=15\cdot3^7=32805\). In exams, use \(r^7\) for the eighth term.
Why this answer is correct
The correct answer is A. (32805). \(a_8=15\cdot3^7=32805\). In exams, use \(r^7\) for the eighth term.
Exam Tip
\(a_8=15\cdot3^7=32805\) है। परीक्षा में आठवें पद के लिए \(r^7\) लगाएँ।
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