गुणोत्तर श्रेणी \(20,40,80,\ldots\) के पहले (8) पदों का योग क्या है?

What is the sum of the first (8) terms of the geometric progression \(20,40,80,\ldots\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. (5100)

Step 1

Concept

(S_8=20\(2^8-1\)=5100). In exams, use \(2^8=256\).

Step 2

Why this answer is correct

The correct answer is A. (5100). (S_8=20\(2^8-1\)=5100). In exams, use \(2^8=256\).

Step 3

Exam Tip

(S_8=20\(2^8-1\)=5100) है। परीक्षा में \(2^8=256\) का उपयोग करें।

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Mathematics Answer, Explanation and Revision Hints

गुणोत्तर श्रेणी \(20,40,80,\ldots\) के पहले (8) पदों का योग क्या है? / What is the sum of the first (8) terms of the geometric progression \(20,40,80,\ldots\)?

Correct Answer: A. (5100). Explanation: (S_8=20\(2^8-1\)=5100) है। परीक्षा में \(2^8=256\) का उपयोग करें। / (S_8=20\(2^8-1\)=5100). In exams, use \(2^8=256\).

Which concept should I revise for this Mathematics MCQ?

(S_8=20\(2^8-1\)=5100). In exams, use \(2^8=256\).

What exam hint can help solve this Mathematics question?

(S_8=20\(2^8-1\)=5100) है। परीक्षा में \(2^8=256\) का उपयोग करें।