यदि समांतर श्रेणी में \(a_1=13\) और (d=9) है, तो \(a_4\) क्या होगा?
If an arithmetic progression has \(a_1=13\) and (d=9), what is \(a_4\)?
Explanation opens after your attempt
C. (40)
Concept
\(a_4=13+3\times9=40\). In exams, add three differences for the fourth term.
Why this answer is correct
The correct answer is C. (40). \(a_4=13+3\times9=40\). In exams, add three differences for the fourth term.
Exam Tip
\(a_4=13+3\times9=40\) है। परीक्षा में चौथे पद के लिए तीन अंतर जोड़ें।
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