समांतर श्रेणी में \(a_5=18\) और \(a_{12}=46\) है। समान अंतर (d) क्या है?
In an arithmetic progression, \(a_5=18\) and \(a_{12}=46\). What is the common difference (d)?
Explanation opens after your attempt
B. (4)
Concept
\(a_{12}-a_5=7d=28\), so (d=4). Always count the difference of term positions carefully.
Why this answer is correct
The correct answer is B. (4). \(a_{12}-a_5=7d=28\), so (d=4). Always count the difference of term positions carefully.
Exam Tip
\(a_{12}-a_5=7d=28\), इसलिए (d=4)। दो पदों के बीच पद-संख्या का अंतर जरूर गिनें।
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