Question
Download Solution PDFఒకవేళ x + y = 18 మరియు xy = 9 అయితే, \(\rm \left(\frac{x}{y}+\frac{y}{x}\right)\) విలువ:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFఇవ్వబడింది:
x + y = 18 మరియు xy = 9
ఉపయోగించిన సూత్రం:
\(\dfrac{x}{y} + \dfrac{y}{x} = \dfrac{x^2 + y^2}{xy}\)
గణన:
మనకు తెలుసు, \((x + y)^2 = x^2 + y^2 + 2xy\)
ఇవ్వబడింది: x + y = 18 మరియు xy = 9
⇒ \((18)^2 = x^2 + y^2 + 2 \times 9\)
⇒ \(324 = x^2 + y^2 + 18\)
⇒ \(x^2 + y^2 = 324 - 18\)
⇒ \(x^2 + y^2 = 306\)
⇒ \(\dfrac{x^2 + y^2}{xy} = \dfrac{306}{9}\)
⇒ \(\dfrac{306}{9} = 34\)
కాబట్టి, సరైన సమాధానం 3వ ఎంపిక.
Last updated on Jul 15, 2025
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