यदि \(a_n=\frac{n(n+1)}{2}\) है, तो \(a_8\) क्या होगा?
If \(a_n=\frac{n(n+1)}{2}\), what is \(a_8\)?
Explanation opens after your attempt
C. (36)
Concept
\(a_8=\frac{8\cdot9}{2}=36\). Multiply or simplify before dividing.
Why this answer is correct
The correct answer is C. (36). \(a_8=\frac{8\cdot9}{2}=36\). Multiply or simplify before dividing.
Exam Tip
\(a_8=\frac{8\cdot9}{2}=36\)। भाग देने से पहले गुणा करें या सरल करें।
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