यदि गुणोत्तर श्रेढ़ी में \(a_1=4\) और \(a_4=108\) है, तो सार्व अनुपात क्या है?
If a geometric progression has \(a_1=4\) and \(a_4=108\), what is the common ratio?
Explanation opens after your attempt
B. (3)
Concept
\(a_4=a_1r^3\), so \(108=4r^3\) and \(r^3=27\), hence (r=3). Use the position gap as the exponent.
Why this answer is correct
The correct answer is B. (3). \(a_4=a_1r^3\), so \(108=4r^3\) and \(r^3=27\), hence (r=3). Use the position gap as the exponent.
Exam Tip
\(a_4=a_1r^3\), इसलिए \(108=4r^3\) और \(r^3=27\), अतः (r=3)। पद-संख्या के अंतर को घात बनाएं।
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