गुणोत्तर श्रेढ़ी में \(a_1=10\) और \(a_4=270\) है। धनात्मक (r) क्या होगा?
In a geometric progression, \(a_1=10\) and \(a_4=270\). What will be the positive (r)?
Explanation opens after your attempt
B. (3)
Concept
\(a_4=a_1r^3\), so \(270=10r^3\) and \(r^3=27\), hence (r=3). Use the position gap as the exponent.
Why this answer is correct
The correct answer is B. (3). \(a_4=a_1r^3\), so \(270=10r^3\) and \(r^3=27\), hence (r=3). Use the position gap as the exponent.
Exam Tip
\(a_4=a_1r^3\), इसलिए \(270=10r^3\) और \(r^3=27\), अतः (r=3)। पदों की दूरी को घात बनाएं।
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