यदि गुणोत्तर श्रेढ़ी में \(a_2=6\) और \(a_4=54\) है, तो \(a_1+a_5\) का मान क्या होगा?
If a geometric progression has \(a_2=6\) and \(a_4=54\), what will be the value of \(a_1+a_5\)?
Explanation opens after your attempt
A. (164)
Concept
\(a_4=a_2r^2\), so (r=3), \(a_1=2\), and \(a_5=162\), hence the sum is (164). Find (r) first.
Why this answer is correct
The correct answer is A. (164). \(a_4=a_2r^2\), so (r=3), \(a_1=2\), and \(a_5=162\), hence the sum is (164). Find (r) first.
Exam Tip
\(a_4=a_2r^2\), इसलिए (r=3), \(a_1=2\) और \(a_5=162\), अतः योग (164) है। पहले (r) निकालें।
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