किस (x) के लिए (8,x,18) धनात्मक गुणोत्तर श्रेढ़ी के लगातार पद होंगे?
For which (x) will (8,x,18) be consecutive terms of a positive geometric progression?
Explanation opens after your attempt
B. (12)
Concept
\(x^2=8\cdot18=144\), so positive (x=12). The middle term is the geometric mean.
Why this answer is correct
The correct answer is B. (12). \(x^2=8\cdot18=144\), so positive (x=12). The middle term is the geometric mean.
Exam Tip
\(x^2=8\cdot18=144\), इसलिए धनात्मक (x=12)। मध्य पद ज्यामितीय माध्य होता है।
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