यदि \(a_n=n^2+n-1\) है, तो \(a_6\) का मान क्या होगा?
If \(a_n=n^2+n-1\), what is the value of \(a_6\)?
Explanation opens after your attempt
D. (41)
Concept
\(a_6=36+6-1=41\). In exams, add the square and (n), then subtract (1).
Why this answer is correct
The correct answer is D. (41). \(a_6=36+6-1=41\). In exams, add the square and (n), then subtract (1).
Exam Tip
\(a_6=36+6-1=41\) है। परीक्षा में वर्ग और (n) जोड़कर (1) घटाएँ।
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