\[\boxed{\text{388\ (388).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[1)\ \left( \sqrt{6} \right)^{2} = 6\]
\[2)\ \left( - \sqrt{21} \right)^{2} = 21\]
\[3)\ \left( 3\sqrt{2} \right)^{2} = 9 \cdot 2 = 18\]
\[4)\ \left( - 4\sqrt{5} \right)^{2} = 16 \cdot 5 = 80\]
\[5)\ \left( - \frac{\sqrt{6}}{3} \right)^{2} = \frac{6}{9} = \frac{2}{3}\]
\[6)\ \left( \frac{1}{4} \cdot \sqrt{26} \right)^{2} = \frac{26}{16} = \frac{13}{8} = 1\frac{5}{8}\]
\[\boxed{\text{3}\text{88}\text{.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[y = - x^{3}\]
\[1)\ D(y) = R;\]
\[E(y) = R;\]
\[y = 0\ при\ x = 0.\]