गुणोत्तर श्रेणी \(12,24,48,\ldots\) में \(a_n=1536\) हो, तो (n) क्या है?

In the geometric progression \(12,24,48,\ldots\), if \(a_n=1536\), what is (n)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (8)

Step 1

Concept

From \(12\cdot2^{n-1}=1536\), \(2^{n-1}=128=2^7\), so (n=8). In exams, factor first and compare powers.

Step 2

Why this answer is correct

The correct answer is B. (8). From \(12\cdot2^{n-1}=1536\), \(2^{n-1}=128=2^7\), so (n=8). In exams, factor first and compare powers.

Step 3

Exam Tip

\(12\cdot2^{n-1}=1536\) से \(2^{n-1}=128=2^7\), इसलिए (n=8) है। परीक्षा में गुणनखंड निकालकर घात तुलना करें।

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गुणोत्तर श्रेणी \(12,24,48,\ldots\) में \(a_n=1536\) हो, तो (n) क्या है? / In the geometric progression \(12,24,48,\ldots\), if \(a_n=1536\), what is (n)?

Correct Answer: B. (8). Explanation: \(12\cdot2^{n-1}=1536\) से \(2^{n-1}=128=2^7\), इसलिए (n=8) है। परीक्षा में गुणनखंड निकालकर घात तुलना करें। / From \(12\cdot2^{n-1}=1536\), \(2^{n-1}=128=2^7\), so (n=8). In exams, factor first and compare powers.

Which concept should I revise for this Mathematics MCQ?

From \(12\cdot2^{n-1}=1536\), \(2^{n-1}=128=2^7\), so (n=8). In exams, factor first and compare powers.

What exam hint can help solve this Mathematics question?

\(12\cdot2^{n-1}=1536\) से \(2^{n-1}=128=2^7\), इसलिए (n=8) है। परीक्षा में गुणनखंड निकालकर घात तुलना करें।