Вопрос:

Постройте график функции: y=|x+2|+2x.

Ответ:

\[y = |x + 2| + 2x\]

\[y = \left\{ \begin{matrix} 3x + 1,\ \ x \geq - 1 \\ x - 1,\ \ \ \ \ \ \ \ \ \ \ \ x < - 1 \\ \end{matrix} \right.\ \]

\[3x + 1 = y\]

\[x\] \[0\] \[- 1\]
\[y\] \[1\] \[- 2\]

\[x - 1 = y\]

\[x\] \[0\] \[1\]
\[y\] \[- 1\] \[0\]

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