गुणोत्तर श्रेणी \(7,14,28,\ldots\) के पहले (9) पदों का योग क्या है?

What is the sum of the first (9) terms of the geometric progression \(7,14,28,\ldots\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. (3577)

Step 1

Concept

(S_9=7\(2^9-1\)=3577). In exams, remembering \(2^9=512\) is useful.

Step 2

Why this answer is correct

The correct answer is A. (3577). (S_9=7\(2^9-1\)=3577). In exams, remembering \(2^9=512\) is useful.

Step 3

Exam Tip

(S_9=7\(2^9-1\)=3577) है। परीक्षा में \(2^9=512\) याद रखना उपयोगी है।

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Mathematics Answer, Explanation and Revision Hints

गुणोत्तर श्रेणी \(7,14,28,\ldots\) के पहले (9) पदों का योग क्या है? / What is the sum of the first (9) terms of the geometric progression \(7,14,28,\ldots\)?

Correct Answer: A. (3577). Explanation: (S_9=7\(2^9-1\)=3577) है। परीक्षा में \(2^9=512\) याद रखना उपयोगी है। / (S_9=7\(2^9-1\)=3577). In exams, remembering \(2^9=512\) is useful.

Which concept should I revise for this Mathematics MCQ?

(S_9=7\(2^9-1\)=3577). In exams, remembering \(2^9=512\) is useful.

What exam hint can help solve this Mathematics question?

(S_9=7\(2^9-1\)=3577) है। परीक्षा में \(2^9=512\) याद रखना उपयोगी है।