\[\boxed{\text{1025\ (1025).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ \left\{ \begin{matrix} |x| - y = 0 \\ x - y = - 4 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ \ }\left\{ \begin{matrix} y = |x|\text{\ \ \ \ \ } \\ y = x + 4 \\ \end{matrix} \right.\ \ \]
\[y = |x|\]
\[x\] | \[0\] | \[1\] | \[- 1\] |
---|---|---|---|
\[y\] | \[0\] | \[1\] | \[1\] |
\[y = x + 4\]
\[x\] | \[- 1\] | \[- 2\] |
---|---|---|
\[y\] | \[3\] | \[2\] |
\(\ \)
\[Ответ:( - 2;2).\]
\[2)\ \left\{ \begin{matrix} |x| - y = 0 \\ x + 3y = 4 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ \ \ }\left\{ \begin{matrix} y = |x| \\ y = \frac{4 - x}{3} \\ \end{matrix} \right.\ \ \]
\[y = |x|\]
\[x\] | \[0\] | \[1\] | \[- 1\] |
---|---|---|---|
\[y\] | \[0\] | \[1\] | \[1\] |
\[y = \frac{4 - x}{3}\]
\[x\] | \[4\] | \[1\] |
---|---|---|
\[y\] | \[0\] | \[1\] |
\(\ \)
\[Ответ:(1;1),\ ( - 2;2).\]
\[3)\ \left\{ \begin{matrix} y + |x| = 0 \\ x + y = 2 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ \ \ \ }\left\{ \begin{matrix} y = - |x| \\ y = 2 - x \\ \end{matrix} \right.\ \]
\[y = - |x|\]
\[x\] | \[0\] | \[1\] | \[- 1\] |
---|---|---|---|
\[y\] | \[0\] | \[- 1\] | \[- 1\] |
\[y = 2 - x\]
\[x\] | \[1\] | \[2\] |
---|---|---|
\[y\] | \[1\] | \[0\] |
\(\ \)
\[Ответ:нет\ решений.\]
\[4)\ \left\{ \begin{matrix} x - |y| = 0 \\ 2x - y = 3 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ \ }\left\{ \begin{matrix} x = |y|\text{\ \ \ \ \ \ \ } \\ y = 2x - 3 \\ \end{matrix} \right.\ \]
\[x = |y|\]
\[x\] | \[0\] | \[1\] | \[1\] |
---|---|---|---|
\[y\] | \[0\] | \[1\] | \[- 1\] |
\[y = 2x - 3\]
\[x\] | \[1\] | \[2\] |
---|---|---|
\[y\] | \[- 1\] | \[1\] |
\(\ \)
\[Ответ:(3;3),\ (1;\ - 1)\text{.\ }\]