गुणोत्तर श्रेणी \(5,15,45,135,\ldots\) का \(a_8\div a_5\) क्या होगा?

What is \(a_8\div a_5\) for the geometric progression \(5,15,45,135,\ldots\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (27)

Step 1

Concept

The position gap is (3) and (r=3), so the ratio is \(3^3=27\). In exams use \(\frac{a_m}{a_n}=r^{m-n}\).

Step 2

Why this answer is correct

The correct answer is C. (27). The position gap is (3) and (r=3), so the ratio is \(3^3=27\). In exams use \(\frac{a_m}{a_n}=r^{m-n}\).

Step 3

Exam Tip

पद-संख्या का अंतर (3) है और (r=3) इसलिए अनुपात \(3^3=27\) है। परीक्षा में \(\frac{a_m}{a_n}=r^{m-n}\) लगाएँ।

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Mathematics Answer, Explanation and Revision Hints

गुणोत्तर श्रेणी \(5,15,45,135,\ldots\) का \(a_8\div a_5\) क्या होगा? / What is \(a_8\div a_5\) for the geometric progression \(5,15,45,135,\ldots\)?

Correct Answer: C. (27). Explanation: पद-संख्या का अंतर (3) है और (r=3) इसलिए अनुपात \(3^3=27\) है। परीक्षा में \(\frac{a_m}{a_n}=r^{m-n}\) लगाएँ। / The position gap is (3) and (r=3), so the ratio is \(3^3=27\). In exams use \(\frac{a_m}{a_n}=r^{m-n}\).

Which concept should I revise for this Mathematics MCQ?

The position gap is (3) and (r=3), so the ratio is \(3^3=27\). In exams use \(\frac{a_m}{a_n}=r^{m-n}\).

What exam hint can help solve this Mathematics question?

पद-संख्या का अंतर (3) है और (r=3) इसलिए अनुपात \(3^3=27\) है। परीक्षा में \(\frac{a_m}{a_n}=r^{m-n}\) लगाएँ।