गुणोत्तर श्रेणी \(9,36,144,\ldots\) का कौन-सा पद (9216) है?
Which term of the geometric progression \(9,36,144,\ldots\) is (9216)?
Explanation opens after your attempt
B. छठा पद(6)th term
Concept
From \(9\cdot4^{n-1}=9216\), \(4^{n-1}=1024=4^5\), so (n=6). In exams, equate powers to find the term number.
Why this answer is correct
The correct answer is B. छठा पद / (6)th term. From \(9\cdot4^{n-1}=9216\), \(4^{n-1}=1024=4^5\), so (n=6). In exams, equate powers to find the term number.
Exam Tip
\(9\cdot4^{n-1}=9216\) से \(4^{n-1}=1024=4^5\), इसलिए (n=6) है। परीक्षा में घात बराबर करके पद संख्या निकालें।
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