यदि \(a_3=40\) और \(a_5=360\) है, तथा (r) धनात्मक है, तो \(a_7\) क्या होगा?
If \(a_3=40\) and \(a_5=360\), and (r) is positive, what will \(a_7\) be?
Explanation opens after your attempt
C. (3240)
Concept
\(a_5=a_3r^2\), so \(r^2=9\), and \(a_7=a_5r^2=360\cdot9=3240\). The same multiplier applies over the same gap.
Why this answer is correct
The correct answer is C. (3240). \(a_5=a_3r^2\), so \(r^2=9\), and \(a_7=a_5r^2=360\cdot9=3240\). The same multiplier applies over the same gap.
Exam Tip
\(a_5=a_3r^2\), इसलिए \(r^2=9\), और \(a_7=a_5r^2=360\cdot9=3240\)। समान दूरी पर वही गुणक लगता है।
Login to save your score, XP, coins and progress.
