यदि समांतर श्रेणी में \(a_2+a_6=40\) है, तो \(a_4\) क्या होगा?
If in an arithmetic progression \(a_2+a_6=40\), what is \(a_4\)?
Explanation opens after your attempt
C. (20)
Concept
\(a_4\) is equidistant from \(a_2\) and \(a_6\), so \(a_4=\frac{40}{2}=20\). The average of symmetric terms is the middle term.
Why this answer is correct
The correct answer is C. (20). \(a_4\) is equidistant from \(a_2\) and \(a_6\), so \(a_4=\frac{40}{2}=20\). The average of symmetric terms is the middle term.
Exam Tip
\(a_4\), \(a_2\) और \(a_6\) से समान दूरी पर है, इसलिए \(a_4=\frac{40}{2}=20\)। सममित पदों का औसत मध्य पद होता है।
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