गुणोत्तर श्रेढ़ी \(5,25,125,\ldots\) में \(a_4\) क्या होगा?
In the geometric progression \(5,25,125,\ldots\), what is \(a_4\)?
Explanation opens after your attempt
C. (625)
Concept
The common ratio is (5), so \(a_4=5\cdot5^3=625\). For the fourth term the ratio is used (3) times.
Why this answer is correct
The correct answer is C. (625). The common ratio is (5), so \(a_4=5\cdot5^3=625\). For the fourth term the ratio is used (3) times.
Exam Tip
सार्व अनुपात (5) है, इसलिए \(a_4=5\cdot5^3=625\)। (4)वें पद के लिए (3) बार अनुपात लगता है।
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