\[\boxed{\text{326\ (326).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[График\ y = x^{2}\ представим\ в\ \]
\[виде\ y = (x - a)^{2} + b;\]
\[где\ a,\ b - смещение\]
\[вершины\ параболы\ \]
\[(она\ же\ точка\ вершины\ параболы).\]
\[\textbf{а)}\ y = \frac{1}{2} \cdot (x + 4)^{2}\]
\[\textbf{б)}\ y = - 2 \cdot (x - 1)^{2}\ \]
\[\boxed{\text{326.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[y = - \frac{16}{x}\]
\[x\] | \[2\] | \[- 20\] | \[- 0,4\] | \[0,5\] |
---|---|---|---|---|
\[y\] | \[- 8\] | \[0,8\] | \[40\] | \[- 32\] |
\[- \frac{16}{x} = 0,8\]
\[0,8x = - 16\]
\[x = - 20.\]
\[- \frac{16}{x} = - 32\]
\[- 32x = - 16\]
\[x = 0,5.\ \]