\[\boxed{\text{6\ (6).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[x\] | \[- 13\] | \[- 5\] | \[0,2\] | \[0\] | \[\frac{1}{17}\] | \[1\] | \[5\frac{2}{3}\] | \[7\] |
---|---|---|---|---|---|---|---|---|
\[\frac{x + 5}{x - 3}\] | \[0,5\] | \[0\] | \[- 1,5\] | \[- 1\frac{2}{3}\] | \[- 1,72\] | \[- 3\] | \[4\] | \[3\] |
\[\frac{- 13 + 5}{- 13 - 3} = \frac{- 8}{- 16} = \frac{1}{2} = 0,5\]
\[\frac{- 5 + 5}{- 5 - 3} = \frac{0}{- 8} = 0\]
\[\frac{- 0,2 + 5}{- 0,2 - 3} = \frac{4,8}{- 3,2} = - 1,5\]
\[\frac{0 + 5}{0 - 3} = \frac{5}{- 3} = - 1\frac{2}{3}\]
\[\frac{\frac{1}{17} + 5}{\frac{1}{17} - 3} = \frac{\frac{1 + 85}{17}}{\frac{1 - 51}{17}} = \frac{86}{17} \cdot \frac{17}{- 50} =\]
\[= - 1,72\]
\[\frac{1 + 5}{1 - 3} = \frac{6}{- 2} = - 3\]
\[\frac{5\frac{2}{3} + 5}{5\frac{2}{3} - 3} = \frac{10\frac{2}{3}}{2\frac{2}{3}} = \frac{32}{2} \cdot \frac{2}{8} = 4\]
\[\frac{7 + 5}{7 - 3} = \frac{12}{4} = 3\]
\[\boxed{\text{6.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
Пояснение.
Чтобы найти значение дроби, подставим в выражение вместо x данные числа.
Решение.
\[x\] | \[- 13\] | \[- 5\] | \[0,2\] | \[0\] | \[\frac{1}{17}\] | \[1\] | \[5\frac{2}{3}\] | \[7\] |
---|---|---|---|---|---|---|---|---|
\[\frac{x + 5}{x - 3}\] | \[0,5\] | \[0\] | \[- 1,5\] | \[- 1\frac{2}{3}\] | \[- 1,72\] | \[- 3\] | \[4\] | \[3\] |
\[\frac{- 13 + 5}{- 13 - 3} = \frac{- 8}{- 16} = \frac{1}{2} = 0,5\ \]
\[\frac{- 5 + 5}{- 5 - 3} = \frac{0}{- 8} = 0\]
\[\frac{- 0,2 + 5}{- 0,2 - 3} = \frac{4,8}{- 3,2} = - 1,5\]
\[\frac{0 + 5}{0 - 3} = \frac{5}{- 3} = - 1\frac{2}{3}\]
\[\frac{\frac{1}{17} + 5}{\frac{1}{17} - 3} = \frac{\frac{1 + 85}{17}}{\frac{1 - 51}{17}} = \frac{86}{17} \cdot \frac{17}{- 50} =\]
\[= - 1,72\]
\[\frac{1 + 5}{1 - 3} = \frac{6}{- 2} = - 3\]
\[\frac{5\frac{2}{3} + 5}{5\frac{2}{3} - 3} = \frac{10\frac{2}{3}}{2\frac{2}{3}} = \frac{32}{2} \cdot \frac{2}{8} = 4\]
\[\frac{7 + 5}{7 - 3} = \frac{12}{4} = 3\]