यदि (a_n=\frac{n(n+5)}{2}) है, तो \(a_7\) क्या होगा?
If (a_n=\frac{n(n+5)}{2}), what is \(a_7\)?
Explanation opens after your attempt
C. (42)
Concept
(a_7=\frac{7(12)}{2}=42). Multiply or simplify before dividing.
Why this answer is correct
The correct answer is C. (42). (a_7=\frac{7(12)}{2}=42). Multiply or simplify before dividing.
Exam Tip
(a_7=\frac{7(12)}{2}=42)। भाग देने से पहले गुणा करें या सरल करें।
Login to save your score, XP, coins and progress.
