यदि \(a_n=3^n-2n\) है तो \(a_3\) का मान क्या होगा?
If \(a_n=3^n-2n\) then what is the value of \(a_3\)?
Explanation opens after your attempt
B. (21)
Concept
\(a_3=27-6=21\). In exams find the power and subtract (2n).
Why this answer is correct
The correct answer is B. (21). \(a_3=27-6=21\). In exams find the power and subtract (2n).
Exam Tip
\(a_3=27-6=21\) है। परीक्षा में घात निकालकर (2n) घटाएँ।
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