\[\boxed{\text{1080.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
\[\textbf{а)}\ f(x) = 1,5 - 3x\]
\[D(f) = ( - \infty; + \infty);\ \ \ \]
\[E(f) = ( - \infty; + \infty).\]
\[\textbf{б)}\ f(x) = 4,5x\]
\[D(f) = ( - \infty; + \infty);\]
\[E(f) = ( - \infty; + \infty).\]
\[\textbf{в)}\ f(x) = \frac{10}{x}\]
\[D(f) = ( - \infty;0) \cup (0; + \infty);\]
\[E(f) = ( - \infty;0) \cup (0; + \infty).\]
\[\textbf{г)}\ f(x) = - \frac{1}{x}\]
\[D(f) = ( - \infty;0) \cup (0; + \infty);\]
\[E(f) = ( - \infty;0) \cup (0; + \infty).\]