\[\boxed{\text{2\ (2).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[f(x) = \frac{x - 0,5}{x + 0,5}\]
\[f(0) = \frac{0 - 0,5}{0 + 0,5} = - \frac{0,5}{0,5} = - 1\]
\[f(1,5) = \frac{1,5 - 0,5}{1,5 + 0,5} = \frac{1}{2} = 0,5\]
\[f( - 1) = \frac{- 1 - 0,5}{- 1 + 0,5} = \frac{- 1,5}{- 0,5} = 3\]
\[\boxed{\text{2\ }\text{ОК\ ГДЗ\ -\ домашка\ на\ 5}}\]
\[\sqrt{2} \approx 1,4142;\ \ \ \sqrt{3} \approx 1,7320.\]
\[Числа:\]
\[1,(5);\ \ 1,68.\]