गुणोत्तर श्रेणी \(5,10,20,40,\ldots\) के पहले (8) पदों का योग क्या है?

What is the sum of the first (8) terms of the geometric progression \(5,10,20,40,\ldots\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. (1275)

Step 1

Concept

(S_8=5\(2^8-1\)=1275). In exams calculate powers quickly when the ratio is (2).

Step 2

Why this answer is correct

The correct answer is A. (1275). (S_8=5\(2^8-1\)=1275). In exams calculate powers quickly when the ratio is (2).

Step 3

Exam Tip

(S_8=5\(2^8-1\)=1275) है। परीक्षा में अनुपात (2) हो तो घात जल्दी निकालें।

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Mathematics Answer, Explanation and Revision Hints

गुणोत्तर श्रेणी \(5,10,20,40,\ldots\) के पहले (8) पदों का योग क्या है? / What is the sum of the first (8) terms of the geometric progression \(5,10,20,40,\ldots\)?

Correct Answer: A. (1275). Explanation: (S_8=5\(2^8-1\)=1275) है। परीक्षा में अनुपात (2) हो तो घात जल्दी निकालें। / (S_8=5\(2^8-1\)=1275). In exams calculate powers quickly when the ratio is (2).

Which concept should I revise for this Mathematics MCQ?

(S_8=5\(2^8-1\)=1275). In exams calculate powers quickly when the ratio is (2).

What exam hint can help solve this Mathematics question?

(S_8=5\(2^8-1\)=1275) है। परीक्षा में अनुपात (2) हो तो घात जल्दी निकालें।