यदि \(a_n=\frac{n^2+n}{2}\) है, तो \(a_{10}\) क्या होगा?
If \(a_n=\frac{n^2+n}{2}\), what is \(a_{10}\)?
Explanation opens after your attempt
C. (55)
Concept
\(a_{10}=\frac{100+10}{2}=55\). Simplify the numerator first and then divide by (2).
Why this answer is correct
The correct answer is C. (55). \(a_{10}=\frac{100+10}{2}=55\). Simplify the numerator first and then divide by (2).
Exam Tip
\(a_{10}=\frac{100+10}{2}=55\)। अंश को पहले सरल करें फिर (2) से भाग दें।
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