गुणोत्तर श्रेणी \(15,45,135,\ldots\) में \(a_8\) क्या है?

What is \(a_8\) in the geometric progression \(15,45,135,\ldots\)?

Author: Muft Shiksha Editorial Team Published:
Explanation opens after your attempt
Correct Answer

A. (32805)

Step 1

Concept

\(a_8=15\cdot3^7=32805\). In exams, use \(r^7\) for the eighth term.

Step 2

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.

Step 3

Exam Tip

\(a_8=15\cdot3^7=32805\) है। परीक्षा में आठवें पद के लिए \(r^7\) लगाएँ।

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Mathematics Answer, Explanation and Revision Hints

गुणोत्तर श्रेणी \(15,45,135,\ldots\) में \(a_8\) क्या है? / What is \(a_8\) in the geometric progression \(15,45,135,\ldots\)?

Correct Answer: A. (32805). Explanation: \(a_8=15\cdot3^7=32805\) है। परीक्षा में आठवें पद के लिए \(r^7\) लगाएँ। / \(a_8=15\cdot3^7=32805\). In exams, use \(r^7\) for the eighth term.

Which concept should I revise for this Mathematics MCQ?

\(a_8=15\cdot3^7=32805\). In exams, use \(r^7\) for the eighth term.

What exam hint can help solve this Mathematics question?

\(a_8=15\cdot3^7=32805\) है। परीक्षा में आठवें पद के लिए \(r^7\) लगाएँ।