\[\boxed{\text{246}\text{\ (246)}\text{.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ f(x) = \frac{x - 5}{(x - 2)(x - 1)}\]
\[2)\ f(x) = \frac{\sqrt{x - 5}}{x^{2} + 1}\]
\[3)\ f(x) = \frac{\sqrt{10 - x}}{5 \cdot (x + 1)}\]
\[4)\ f(x) = \sqrt{x + 4} + \sqrt{- 4 - x}\ \]
\[\boxed{\mathbf{246.\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[- 3 \leq a \leq 2;\ - 1 \leq b \leq 3\]
\[1) - 9 \leq 3a \leq 6;\ \ \]
\[- 4 \leq 4b \leq 12\]
\[- 13 \leq 3a + 4b \leq 18\ \ \]
\[целых\ значений\ 32.\]
\[2) - 12 \leq 4a \leq 8;\ \ \]
\[- 9 \leq - 3b \leq 3\]
\[- 21 \leq 4a - 3b \leq 11\ \ \]
\[целых\ значений\ 33.\]