क्रम \(15,21,27,33,\ldots\) में \(a_9\) और \(a_4\) का अंतर क्या है?
What is the difference between \(a_9\) and \(a_4\) in \(15,21,27,33,\ldots\)?
Explanation opens after your attempt
B. (30)
Concept
The common difference is (6), and the gap in positions is (5). So the difference is \(5\times6=30\).
Why this answer is correct
The correct answer is B. (30). The common difference is (6), and the gap in positions is (5). So the difference is \(5\times6=30\).
Exam Tip
समान अंतर (6) है और स्थानों का अंतर (5) है। इसलिए अंतर \(5\times6=30\) है।
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