गुणोत्तर श्रेणी \(729,243,81,27,\ldots\) का आठवाँ पद क्या है?
What is the eighth term of the geometric progression \(729,243,81,27,\ldots\)?
Explanation opens after your attempt
B. \(\frac{1}{3}\)
Concept
Here \(r=\frac{1}{3}\), so (a_8=729\cdot\left\(\frac{1}{3}\right\)7=\frac{1}{3}). In exams, apply fractional ratios carefully in decreasing GPs.
Why this answer is correct
The correct answer is B. \(\frac{1}{3}\). Here \(r=\frac{1}{3}\), so (a_8=729\cdot\left\(\frac{1}{3}\right\)7=\frac{1}{3}). In exams, apply fractional ratios carefully in decreasing GPs.
Exam Tip
यहाँ \(r=\frac{1}{3}\) है, इसलिए (a_8=729\cdot\left\(\frac{1}{3}\right\)7=\frac{1}{3}) है। परीक्षा में घटती GP में भिन्न अनुपात सावधानी से लगाएँ।
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