यदि \(a_1=7\) और \(a_4=189\) है तथा (r) धनात्मक है तो \(a_6\) क्या होगा?
If \(a_1=7\) and \(a_4=189\), and (r) is positive, what is \(a_6\)?
Explanation opens after your attempt
A. (1701)
Concept
From \(189=7r^3\), (r=3) and \(a_6=7\cdot3^5=1701\). In exams find the ratio first.
Why this answer is correct
The correct answer is A. (1701). From \(189=7r^3\), (r=3) and \(a_6=7\cdot3^5=1701\). In exams find the ratio first.
Exam Tip
\(189=7r^3\) से (r=3) और \(a_6=7\cdot3^5=1701\) है। परीक्षा में पहले अनुपात निकालें।
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