Решебник по алгебре 9 класс Макарычев Задание 19

\[\boxed{\text{19\ (19).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]

\[y = x^{2}:\ \ \]

\[D(y) = R;\ \ \]

\[E(y) = \lbrack 0;\ + \infty).\]

\[y = x^{3}:\ \]

\[D(y) = R;\ \ \ \]

\[E(y) = R.\]

\[y = \sqrt{x}:\]

\[D(y) = \lbrack 0; + \infty);\ \ \ \]

\[E(y) = \lbrack 0; + \infty).\]

\[\boxed{\text{19.\ }\text{ОК\ ГДЗ\ -\ домашка\ на\ 5}}\]

\[\textbf{а)}\ x < 3\]

\[\textbf{б)} - 2 < x < 4\]

\[\textbf{в)}\ x \geq 1\]

\[\textbf{г)}\ 5 \leq x \leq 7,5\]

\[\textbf{д)}\ 0 < x \leq 2,5\]

\[\textbf{е)}\ x \geq 10,5\ \]