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 \(a_1\)?
Explanation opens after your attempt
C. (12)
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.
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.
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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