Find the square root of the expression \( \frac{1}{x y}\left(x^{2}+y^{2}+z^{2}\right)+2\left(\fr...

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Find the square root of the expression \( \frac{1}{x y}\left(x^{2}+y^{2}+z^{2}\right)+2\left(\frac{1}{x}+\frac{1}{y}+\frac{1}{z}\right) \)
(a) \( \frac{x+y+z}{x y z} \)
(b) \( \sqrt{\frac{y \rightleftharpoons}{x}}+\sqrt{\frac{2 x}{y}}+\sqrt{\frac{x y}{\approx}} \)
(c) \( \sqrt{x}+\sqrt{y}+\sqrt{\approx} \)
(d) \( \sqrt{\frac{x}{y \approx}}+\sqrt{\frac{y}{x \approx}}+\sqrt{\frac{z}{x y}} \)
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