अनुक्रम \(3,12,27,48,75,\ldots\) का सामान्य पद \(a_n=3n^2\) है। \(a_8-a_6\) क्या है?
The sequence \(3,12,27,48,75,\ldots\) has general term \(a_n=3n^2\). What is \(a_8-a_6\)?
Explanation opens after your attempt
C. (84)
Concept
\(a_8=192\) and \(a_6=108\), so the difference is (84). Exam tip: find both terms and then subtract.
Why this answer is correct
The correct answer is C. (84). \(a_8=192\) and \(a_6=108\), so the difference is (84). Exam tip: find both terms and then subtract.
Exam Tip
\(a_8=192\) और \(a_6=108\) इसलिए अंतर (84) है। दोनों पद निकालकर घटाएँ।
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