यदि \(a_1=7\) और \(a_5=1792\) है, तो धनात्मक सार्व अनुपात क्या होगा?
If \(a_1=7\) and \(a_5=1792\), what will be the positive common ratio?
Explanation opens after your attempt
Correct Answer
C. (4)
Concept
\(a_5=a_1r^4\), so \(1792=7r^4\) and \(r^4=256\), hence (r=4). When positive ratio is asked, take the positive root.
Why this answer is correct
The correct answer is C. (4). \(a_5=a_1r^4\), so \(1792=7r^4\) and \(r^4=256\), hence (r=4). When positive ratio is asked, take the positive root.
Exam Tip
\(a_5=a_1r^4\), इसलिए \(1792=7r^4\) और \(r^4=256\), अतः (r=4)। धनात्मक अनुपात मांगने पर धनात्मक मूल लें।
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