यदि (a_n=\frac{n(n+1)}{2}+2) है तो \(a_6\) का मान क्या होगा?
If (a_n=\frac{n(n+1)}{2}+2) then what is the value of \(a_6\)?
Explanation opens after your attempt
B. (23)
Concept
\(a_6=\frac{6\times7}{2}+2=23\). In exams add (2) to the triangular number.
Why this answer is correct
The correct answer is B. (23). \(a_6=\frac{6\times7}{2}+2=23\). In exams add (2) to the triangular number.
Exam Tip
\(a_6=\frac{6\times7}{2}+2=23\) है। परीक्षा में त्रिभुज संख्या में (2) जोड़ें।
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