यदि \(a_2=15\) और \(a_6=1215\) है, तथा अनुपात धनात्मक है, तो \(a_7\) क्या होगा?
If \(a_2=15\) and \(a_6=1215\), and the ratio is positive, what will \(a_7\) be?
Explanation opens after your attempt
B. (3645)
Concept
\(a_6=a_2r^4\), so (r=3), hence \(a_7=1215\cdot3=3645\). First find the ratio and then move forward.
Why this answer is correct
The correct answer is B. (3645). \(a_6=a_2r^4\), so (r=3), hence \(a_7=1215\cdot3=3645\). First find the ratio and then move forward.
Exam Tip
\(a_6=a_2r^4\), इसलिए (r=3), अतः \(a_7=1215\cdot3=3645\)। पहले अनुपात निकालकर आगे बढ़ें।
Login to save your score, XP, coins and progress.
