यदि \(a_6=972\) और (r=3) है, तो \(a_1\) का मान क्या है?
If \(a_6=972\) and (r=3), what is the value of \(a_1\)?
Explanation opens after your attempt
C. (4)
Concept
\(a_6=a\cdot3^5\), so \(a=972\div243=4\). In exams, divide the sixth term by \(r^5\).
Why this answer is correct
The correct answer is C. (4). \(a_6=a\cdot3^5\), so \(a=972\div243=4\). In exams, divide the sixth term by \(r^5\).
Exam Tip
\(a_6=a\cdot3^5\), इसलिए \(a=972\div243=4\) है। परीक्षा में छठे पद से \(r^5\) भाग दें।
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