यदि \(a_n=4\cdot2^{n-1}\) है तो \(a_8\) का मान क्या होगा?
If \(a_n=4\cdot2^{n-1}\) then what is the value of \(a_8\)?
Explanation opens after your attempt
C. (512)
Concept
\(a_8=4\cdot2^7=512\). In exams apply the exponent (n-1) carefully.
Why this answer is correct
The correct answer is C. (512). \(a_8=4\cdot2^7=512\). In exams apply the exponent (n-1) carefully.
Exam Tip
\(a_8=4\cdot2^7=512\) है। परीक्षा में (n-1) वाला घातांक ध्यान से लगाएँ।
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