यदि \(a_3+a_{15}=108\) है, तो \(a_9\) का मान क्या है?
If \(a_3+a_{15}=108\), what is the value of \(a_9\)?
Explanation opens after your attempt
Correct Answer
C. (54)
Concept
\(a_9\) is equidistant from \(a_3\) and \(a_{15}\), so \(a_9=\frac{108}{2}=54\). The average of symmetric terms is the middle term.
Why this answer is correct
The correct answer is C. (54). \(a_9\) is equidistant from \(a_3\) and \(a_{15}\), so \(a_9=\frac{108}{2}=54\). The average of symmetric terms is the middle term.
Exam Tip
\(a_9\), \(a_3\) और \(a_{15}\) से समान दूरी पर है, इसलिए \(a_9=\frac{108}{2}=54\)। सममित पदों का औसत बीच का पद होता है।
Login to save your score, XP, coins and progress.