\[\boxed{\text{358\ (358).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[f(x) =\]
\[= \left\{ \begin{matrix} 2x + 3,\ если\ x \leq - 1\ \ \ \ \ \ \ \ \ \ \\ x^{2},\ \ если - 1 < x < 2 \\ 4,\ \ если\ x \geq 2\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ \end{matrix} \right.\ \]
\[1)\ f( - 4) = 2x + 3 =\]
\[= 2 \cdot ( - 4) + 3 = - 5\]
\[f( - 0,3){= x}^{2} = ( - 0,3)^{2} = 0,09\]
\[f(1,9) = x^{2} = {1,9}^{2} = 3,61\]
\[f(3) = 4\]
\[f( - 1) = 2x + 3 =\]
\[= 2 \cdot ( - 1) + 3 = 1\]
\[f(2) = 4\]
\[2)\ y = x^{2}\]
\[x\] | \[1\] | \[2\] | \[- 1\] | \[- 2\] |
---|---|---|---|---|
\[y\] | \[1\] | \[4\] | \[1\] | \[4\] |
\[y = 2x + 3\]
\[x\] | \[0\] | \[- 1\] |
---|---|---|
\[y\] | \[3\] | \[1\] |