\[\boxed{\mathbf{752}\mathbf{.}}\]
\[y = \arctan x:\]
\[возрастает.\]
\[1)\ arctg\ 2\sqrt{3} < arctg\ 3\sqrt{2}\]
\[2\sqrt{3} < 3\sqrt{2}\]
\[4 \bullet 3 < 9 \bullet 2\]
\[12 < 18.\]
\[2)\ arctg\left( - \frac{1}{\sqrt{2}} \right) < arctg\left( - \frac{1}{\sqrt{5}} \right)\]
\[- \frac{1}{\sqrt{2}} < - \frac{1}{\sqrt{5}}\]
\[\frac{1}{\sqrt{2}} > \frac{1}{\sqrt{5}}\]
\[\sqrt{2} < \sqrt{5}\]
\[2 < 5.\]