यदि \(a_n=8\cdot2^{n-1}\) है, तो (4096) कौन-सा पद होगा?
If \(a_n=8\cdot2^{n-1}\), which term will be (4096)?
Explanation opens after your attempt
Correct Answer
C. दसवाँ पद(10)th term
Concept
From \(8\cdot2^{n-1}=4096\), \(2^{n-1}=512=2^9\), so (n=10). In exams, equate powers to find the term number.
Why this answer is correct
The correct answer is C. दसवाँ पद / (10)th term. From \(8\cdot2^{n-1}=4096\), \(2^{n-1}=512=2^9\), so (n=10). In exams, equate powers to find the term number.
Exam Tip
\(8\cdot2^{n-1}=4096\) से \(2^{n-1}=512=2^9\), इसलिए (n=10) है। परीक्षा में घातों को बराबर करके पद संख्या निकालें।
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