किस गुणोत्तर श्रेणी में (a=9) और \(a_5=2304\) है। यदि (r) धनात्मक है, तो (r) क्या है?
For a geometric progression with (a=9) and \(a_5=2304\), if (r) is positive, what is (r)?
Explanation opens after your attempt
C. (4)
Concept
From \(2304=9r^4\), \(r^4=256=4^4\), so (r=4). In exams, \(r^4\) is used for the fifth term.
Why this answer is correct
The correct answer is C. (4). From \(2304=9r^4\), \(r^4=256=4^4\), so (r=4). In exams, \(r^4\) is used for the fifth term.
Exam Tip
\(2304=9r^4\) से \(r^4=256=4^4\), इसलिए (r=4) है। परीक्षा में पाँचवें पद के लिए \(r^4\) लगता है।
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