यदि समांतर श्रेणी में \(a_3+a_{11}=92\) और समान अंतर (d=6) है, तो पहला पद \(a_1\) क्या होगा?
If in an arithmetic progression \(a_3+a_{11}=92\) and the common difference is (d=6), what is the first term \(a_1\)?
Explanation opens after your attempt
Correct Answer
B. (10)
Concept
\(a_3=a_1+12\) and \(a_{11}=a_1+60\), so \(2a_1+72=92\) and \(a_1=10\). In sum-based questions, write both terms using \(a_1\) and (d).
Why this answer is correct
The correct answer is B. (10). \(a_3=a_1+12\) and \(a_{11}=a_1+60\), so \(2a_1+72=92\) and \(a_1=10\). In sum-based questions, write both terms using \(a_1\) and (d).
Exam Tip
\(a_3=a_1+12\) और \(a_{11}=a_1+60\), इसलिए \(2a_1+72=92\) और \(a_1=10\)। योग वाले प्रश्न में दोनों पदों को \(a_1\) और (d) से लिखें।
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