यदि (a_n=\frac{n(n+1)}{2}+1) है, तो \(a_5\) का मान क्या होगा?
If (a_n=\frac{n(n+1)}{2}+1), what is the value of \(a_5\)?
Explanation opens after your attempt
B. (16)
Concept
\(a_5=\frac{5\times6}{2}+1=16\). In exams, simplify the fractional part and add (1) at the end.
Why this answer is correct
The correct answer is B. (16). \(a_5=\frac{5\times6}{2}+1=16\). In exams, simplify the fractional part and add (1) at the end.
Exam Tip
\(a_5=\frac{5\times6}{2}+1=16\) है। परीक्षा में भिन्न भाग सरल करके अंत में (1) जोड़ें।
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