यदि \(a_n=n^2+cn\) और \(a_4=32\) है तो \(a_9\) का मान क्या होगा?
If \(a_n=n^2+cn\) and \(a_4=32\), what will be the value of \(a_9\)?
Explanation opens after your attempt
D. (117)
Concept
From (16+4c=32), (c=4). Therefore \(a_9=81+36=117\).
Why this answer is correct
The correct answer is D. (117). From (16+4c=32), (c=4). Therefore \(a_9=81+36=117\).
Exam Tip
(16+4c=32) से (c=4) है। इसलिए \(a_9=81+36=117\) होगा।
Login to save your score, XP, coins and progress.
