यदि \(a_2=20\) और \(a_6=5120\) है, तो (r) का धनात्मक मान क्या है?
If \(a_2=20\) and \(a_6=5120\), what is the positive value of (r)?
Explanation opens after your attempt
C. (4)
Concept
\(\frac{a_6}{a_2}=r^4=\frac{5120}{20}=256\), so (r=4). In exams, a gap of (4) positions gives \(r^4\).
Why this answer is correct
The correct answer is C. (4). \(\frac{a_6}{a_2}=r^4=\frac{5120}{20}=256\), so (r=4). In exams, a gap of (4) positions gives \(r^4\).
Exam Tip
\(\frac{a_6}{a_2}=r^4=\frac{5120}{20}=256\), इसलिए (r=4) है। परीक्षा में पद-अंतर (4) हो तो \(r^4\) बनेगा।
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