1.

What is the area of the triangle having side lengths \(\frac{y}{z} + \frac{z}{x},\frac{z}{x} + \frac{x}{y},\frac{x}{y} + \frac{y}{z}?\)

A. \(\frac{{{{\left( {x + y + z} \right)}^2}}}{{xyz}}\)
B. \(\frac{{\sqrt {xyz} }}{{x + y + z}}\)
C. \(\sqrt {\frac{x}{y} + \frac{y}{z} + \frac{z}{x}} \)
D. \(\sqrt {\frac{{xy + yz + zx}}{{xyz}}} \)
Answer» D. \(\sqrt {\frac{{xy + yz + zx}}{{xyz}}} \)


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