\[\boxed{\text{1172.}\text{\ }еуроки - ответы\ на\ пятёрку}\]
\[\textbf{а)}\ y = |x|\]
\[x\] | \[- 1\] | \[2\] |
---|---|---|
\[y\] | \[1\] | \[2\] |
\[|x| = \left\{ \begin{matrix} x,\ \ \ \ \ \ \ \ \ \ \ \ если\ x \geq 0 \\ - x,\ \ если\ x < 0 \\ \end{matrix} \right.\ \]
\[\textbf{б)}\ y = - |x|\]
\[y = \left\{ \begin{matrix} - x,\ \ если\ x \geq 0 \\ x,\ \ если\ x < 0\ \ \ \ \\ \end{matrix} \right.\ \]