यदि \(a_4=135\) और (r=3) है तो पहला पद (a) क्या होगा?
If \(a_4=135\) and (r=3), what is the first term (a)?
Explanation opens after your attempt
B. (5)
Concept
\(a_4=ar^3\), so \(135=a\cdot27\) and (a=5). In exams divide the fourth term by \(r^3\).
Why this answer is correct
The correct answer is B. (5). \(a_4=ar^3\), so \(135=a\cdot27\) and (a=5). In exams divide the fourth term by \(r^3\).
Exam Tip
\(a_4=ar^3\) इसलिए \(135=a\cdot27\) और (a=5) है। परीक्षा में चौथे पद से \(r^3\) भाग दें।
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