यदि \(a_n=2n^3+n\) है तो \(a_3\) का मान क्या होगा?
If \(a_n=2n^3+n\) then what is the value of \(a_3\)?
Explanation opens after your attempt
D. (57)
Concept
\(a_3=2\times27+3=57\). In exams add (n) after cubing.
Why this answer is correct
The correct answer is D. (57). \(a_3=2\times27+3=57\). In exams add (n) after cubing.
Exam Tip
\(a_3=2\times27+3=57\) है। परीक्षा में घन के बाद (n) जोड़ें।
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