यदि \(a_1=4\) और (d=9) है, तो \(a_{15}-a_9\) का मान क्या है?
If \(a_1=4\) and (d=9), what is the value of \(a_{15}-a_9\)?
Explanation opens after your attempt
B. (54)
Concept
There are (6) gaps between \(a_{15}\) and \(a_9\), so the difference is \(6\times9=54\). Term differences can be found directly using (d).
Why this answer is correct
The correct answer is B. (54). There are (6) gaps between \(a_{15}\) and \(a_9\), so the difference is \(6\times9=54\). Term differences can be found directly using (d).
Exam Tip
\(a_{15}\) और \(a_9\) के बीच (6) अंतर हैं, इसलिए अंतर \(6\times9=54\) है। पदों का अंतर सीधे (d) से निकाला जा सकता है।
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