यदि \(a_n=9n+4\) है, तो \(a_n=85\) किस पद पर होगा?
If \(a_n=9n+4\), at which term will \(a_n=85\)?
Explanation opens after your attempt
C. (9)वाँ(9)th
Concept
From (9n+4=85), (9n=81) and (n=9). To find the position, set \(a_n\) equal to the given value.
Why this answer is correct
The correct answer is C. (9)वाँ / (9)th. From (9n+4=85), (9n=81) and (n=9). To find the position, set \(a_n\) equal to the given value.
Exam Tip
(9n+4=85) से (9n=81) और (n=9)। पद का स्थान निकालने के लिए \(a_n\) को दिए मान के बराबर रखें।
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