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# Let $R$ be the region in the first quadrant of the $x y$ -plane boundedby the hyperbolas $x y=1, x y=9$ and the lines $y=x, y=4 x$ .Use the transformation $x=u / v, y=u v$ with $u>0$ and $v>0$to rewrite$$\iint_{R}\left(\sqrt{\frac{y}{x}}+\sqrt{x y}\right) d x d y$$as an integral over an appropriate region $G$ in the $u v$ -plane. Thenevaluate the $u v$ -integral over $G .$

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Multiple Integrals

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