गुणोत्तर श्रेणी \(6,18,54,\ldots\) में कितने पदों तक योग (2184) होगा?

How many terms of the geometric progression \(6,18,54,\ldots\) have sum (2184)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (6)

Step 1

Concept

(S_n=\frac{6\(3^n-1\)}{3-1}=3\(3^n-1\)), and (3\(3^n-1\)=2184) gives (n=6). In exams, simplify the sum and identify the power.

Step 2

Why this answer is correct

The correct answer is C. (6). (S_n=\frac{6\(3^n-1\)}{3-1}=3\(3^n-1\)), and (3\(3^n-1\)=2184) gives (n=6). In exams, simplify the sum and identify the power.

Step 3

Exam Tip

(S_n=\frac{6\(3^n-1\)}{3-1}=3\(3^n-1\)) और (3\(3^n-1\)=2184) से (n=6) है। परीक्षा में योग को सरल करके घात पहचानें।

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Mathematics Answer, Explanation and Revision Hints

गुणोत्तर श्रेणी \(6,18,54,\ldots\) में कितने पदों तक योग (2184) होगा? / How many terms of the geometric progression \(6,18,54,\ldots\) have sum (2184)?

Correct Answer: C. (6). Explanation: (S_n=\frac{6\(3^n-1\)}{3-1}=3\(3^n-1\)) और (3\(3^n-1\)=2184) से (n=6) है। परीक्षा में योग को सरल करके घात पहचानें। / (S_n=\frac{6\(3^n-1\)}{3-1}=3\(3^n-1\)), and (3\(3^n-1\)=2184) gives (n=6). In exams, simplify the sum and identify the power.

Which concept should I revise for this Mathematics MCQ?

(S_n=\frac{6\(3^n-1\)}{3-1}=3\(3^n-1\)), and (3\(3^n-1\)=2184) gives (n=6). In exams, simplify the sum and identify the power.

What exam hint can help solve this Mathematics question?

(S_n=\frac{6\(3^n-1\)}{3-1}=3\(3^n-1\)) और (3\(3^n-1\)=2184) से (n=6) है। परीक्षा में योग को सरल करके घात पहचानें।