\[\boxed{\text{497\ (497).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[1)\ \sqrt{a^{2}} = \sqrt{{4,6}^{2}} = |4,6| = 4,6.\]
\[\sqrt{a^{2}} = \sqrt{( - 18,6)^{2}} = | - 18,6| =\]
\[= 18,6.\]
\[2)\ \sqrt{b^{4}} = \sqrt{( - 3)^{4}} = | - 3|^{2} = 9.\]
\[\sqrt{b^{4}} = \sqrt{{1,2}^{4}} = |{1,2}^{2}| = 1,44.\]
\[3)\ 0,1\sqrt{c^{6}} = 0,1\sqrt{( - 2)^{6}} =\]
\[= 0,1 \cdot | - 2|^{3} = 0,1 \cdot 8 = 0,8.\]
\[0,1\sqrt{c^{6}} = 0,1\sqrt{5^{6}} = 0,1 \cdot \left| 5^{3} \right| =\]
\[= 0,1 \cdot 125 = 12,5.\ \]