यदि \(a_n=3^n-1\) है तो \(a_4\) का मान क्या होगा?
If \(a_n=3^n-1\) then what is the value of \(a_4\)?
Explanation opens after your attempt
B. (80)
Concept
\(a_4=3^4-1=80\). In exams find the power and subtract (1).
Why this answer is correct
The correct answer is B. (80). \(a_4=3^4-1=80\). In exams find the power and subtract (1).
Exam Tip
\(a_4=3^4-1=80\) है। परीक्षा में घात निकालकर (1) घटाएँ।
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