यदि समांतर श्रेणी में \(a_5+a_{15}=150\) है, तो \(a_{10}\) क्या होगा?
If in an arithmetic progression \(a_5+a_{15}=150\), what is \(a_{10}\)?
Explanation opens after your attempt
Correct Answer
C. (75)
Concept
\(a_{10}\) is equidistant from \(a_5\) and \(a_{15}\), so \(a_{10}=\frac{150}{2}=75\). The average of symmetric terms is the middle term.
Why this answer is correct
The correct answer is C. (75). \(a_{10}\) is equidistant from \(a_5\) and \(a_{15}\), so \(a_{10}=\frac{150}{2}=75\). The average of symmetric terms is the middle term.
Exam Tip
\(a_{10}\), \(a_5\) और \(a_{15}\) से समान दूरी पर है, इसलिए \(a_{10}=\frac{150}{2}=75\)। सममित पदों का औसत मध्य पद होता है।
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