किस गुणोत्तर श्रेणी में \(a_3=48\) और \(a_6=384\) है। यदि (r) धनात्मक है तो \(a_1\) क्या है?

In a geometric progression \(a_3=48\) and \(a_6=384\). If (r) is positive what is \(a_1\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (12)

Step 1

Concept

\(\frac{384}{48}=8=r^3\), so (r=2) and \(a_1=\frac{48}{2^2}=12\). In exams find (r) first and then the first term.

Step 2

Why this answer is correct

The correct answer is C. (12). \(\frac{384}{48}=8=r^3\), so (r=2) and \(a_1=\frac{48}{2^2}=12\). In exams find (r) first and then the first term.

Step 3

Exam Tip

\(\frac{384}{48}=8=r^3\) से (r=2) और \(a_1=\frac{48}{2^2}=12\) है। परीक्षा में पहले (r) निकालें फिर पहला पद।

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किस गुणोत्तर श्रेणी में \(a_3=48\) और \(a_6=384\) है। यदि (r) धनात्मक है तो \(a_1\) क्या है? / In a geometric progression \(a_3=48\) and \(a_6=384\). If (r) is positive what is \(a_1\)?

Correct Answer: C. (12). Explanation: \(\frac{384}{48}=8=r^3\) से (r=2) और \(a_1=\frac{48}{2^2}=12\) है। परीक्षा में पहले (r) निकालें फिर पहला पद। / \(\frac{384}{48}=8=r^3\), so (r=2) and \(a_1=\frac{48}{2^2}=12\). In exams find (r) first and then the first term.

Which concept should I revise for this Mathematics MCQ?

\(\frac{384}{48}=8=r^3\), so (r=2) and \(a_1=\frac{48}{2^2}=12\). In exams find (r) first and then the first term.

What exam hint can help solve this Mathematics question?

\(\frac{384}{48}=8=r^3\) से (r=2) और \(a_1=\frac{48}{2^2}=12\) है। परीक्षा में पहले (r) निकालें फिर पहला पद।