समांतर श्रेणी में \(a_4=19\) और \(a_{13}=73\) है। समान अंतर (d) क्या है?
In an arithmetic progression, \(a_4=19\) and \(a_{13}=73\). What is the common difference (d)?
Explanation opens after your attempt
C. (6)
Concept
\(a_{13}-a_4=9d=54\), so (d=6). Count the difference of term positions carefully.
Why this answer is correct
The correct answer is C. (6). \(a_{13}-a_4=9d=54\), so (d=6). Count the difference of term positions carefully.
Exam Tip
\(a_{13}-a_4=9d=54\), इसलिए (d=6)। दो पदों के बीच पद-संख्या का अंतर ध्यान से गिनें।
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