गुणोत्तर श्रेणी \(15,30,60,\ldots\) के पहले (9) पदों का योग क्या है?

What is the sum of the first (9) terms of the geometric progression \(15,30,60,\ldots\)?

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

A. (7665)

Step 1

Concept

(S_9=15\(2^9-1\)=7665). In exams, use \(2^9=512\).

Step 2

Why this answer is correct

The correct answer is A. (7665). (S_9=15\(2^9-1\)=7665). In exams, use \(2^9=512\).

Step 3

Exam Tip

(S_9=15\(2^9-1\)=7665) है। परीक्षा में \(2^9=512\) का उपयोग करें।

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Mathematics Answer, Explanation and Revision Hints

गुणोत्तर श्रेणी \(15,30,60,\ldots\) के पहले (9) पदों का योग क्या है? / What is the sum of the first (9) terms of the geometric progression \(15,30,60,\ldots\)?

Correct Answer: A. (7665). Explanation: (S_9=15\(2^9-1\)=7665) है। परीक्षा में \(2^9=512\) का उपयोग करें। / (S_9=15\(2^9-1\)=7665). In exams, use \(2^9=512\).

Which concept should I revise for this Mathematics MCQ?

(S_9=15\(2^9-1\)=7665). In exams, use \(2^9=512\).

What exam hint can help solve this Mathematics question?

(S_9=15\(2^9-1\)=7665) है। परीक्षा में \(2^9=512\) का उपयोग करें।