यदि \(a_n=3\cdot4^{n-1}\) है, तो \(a_4\) क्या होगा?
If \(a_n=3\cdot4^{n-1}\), what is \(a_4\)?
Explanation opens after your attempt
Correct Answer
C. (192)
Concept
\(a_4=3\cdot4^3=192\). In a geometric rule, the exponent is (n-1).
Why this answer is correct
The correct answer is C. (192). \(a_4=3\cdot4^3=192\). In a geometric rule, the exponent is (n-1).
Exam Tip
\(a_4=3\cdot4^3=192\)। गुणोत्तर नियम में घात (n-1) होती है।
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