गुणोत्तर श्रेणी \(4,12,36,108,\ldots\) का \(a_9\div a_5\) क्या होगा?
What is \(a_9\div a_5\) for the geometric progression \(4,12,36,108,\ldots\)?
Explanation opens after your attempt
B. (81)
Concept
The position gap is (4) and (r=3), so the ratio is \(3^4=81\). In exams, use \(\frac{a_m}{a_n}=r^{m-n}\).
Why this answer is correct
The correct answer is B. (81). The position gap is (4) and (r=3), so the ratio is \(3^4=81\). In exams, use \(\frac{a_m}{a_n}=r^{m-n}\).
Exam Tip
पद-संख्या का अंतर (4) है और (r=3), इसलिए अनुपात \(3^4=81\) है। परीक्षा में \(\frac{a_m}{a_n}=r^{m-n}\) लगाएँ।
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