गुणोत्तर श्रेणी \(729,243,81,27,\ldots\) में (1) कौन-सा पद है?
In the geometric progression \(729,243,81,27,\ldots\), which term is (1)?
Explanation opens after your attempt
Correct Answer
A. सातवाँ पद(7)th term
Concept
From (729\left\(\frac{1}{3}\right\)^{n-1}=1), \(3^{6-(n-1)}=1\), so (n=7). In exams count decreasing powers carefully.
Why this answer is correct
The correct answer is A. सातवाँ पद / (7)th term. From (729\left\(\frac{1}{3}\right\)^{n-1}=1), \(3^{6-(n-1)}=1\), so (n=7). In exams count decreasing powers carefully.
Exam Tip
(729\left\(\frac{1}{3}\right\)^{n-1}=1) से \(3^{6-(n-1)}=1\) इसलिए (n=7) है। परीक्षा में घटती घातों को सावधानी से गिनें।
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