\[\boxed{\text{56\ (}\text{н}\text{).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{б)}\ y = x - \frac{x}{x} = x - 1;\ \ \ \]
\[\ x \neq 0\]
\[\textbf{в)}\ y = \frac{x^{2} - 3x}{x} - \frac{2x^{2} - 2}{x^{2} - 1} =\]
\[= \frac{x(x - 3)}{x} - \frac{2 \cdot \left( x^{2} - 1 \right)}{x^{2} - 1} =\]
\[= x - 3 - 2 =\]
\[= x - 5;\ \ \ \ \ \ x \neq 0;\ \ x \neq 1;\ \ x = - 1.\]
\[\boxed{\text{56\ (}\text{с}\text{).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ y = \frac{x^{2} - 8x + 16}{x - 4};\ \ x \neq 4\]
\[y = \frac{(x - 4)^{2}}{(x - 4)} = x - 4 \Rightarrow график\ \]
\[функции - прямая.\]
\[x\] | \[0\] | \[4\] | \[5\] |
---|---|---|---|
\[y\] | \[- 4\] | \[0\] | \[1\] |
\[2)\ y = x - \frac{x}{x};\ \ x \neq 0\]
\[y = x - 1 \Rightarrow\]
\[\Rightarrow график\ функции - прямая\]
\[x\] | \[1\] | \[2\] | \[3\] |
---|---|---|---|
\[y\] | \[0\] | \[1\] | \[2\] |
\[3)\ y = \frac{x^{2} - 7x}{x} - \frac{2x^{2} - 2}{x^{2} - 1};\ \ \ \ \ \]
\[x \neq 0;\ \ x \neq 1;\ \ x \neq - 1\ \]
\[y = \frac{x(x - 7)}{x} - \frac{2 \cdot (x - 1)(x + 1)}{(x - 1)(x + 1)}\]
\[y = x - 7 - 2\ \]
\[y = x - 9 \Rightarrow\]
\[\Rightarrow график\ функции - прямая.\]
\[x\] | \[4\] | \[6\] | \[7\] |
---|---|---|---|
\[y\] | \[- 5\] | \[- 3\] | \[- 2\] |
\[\boxed{\text{56.\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{б)}\ y = x - \frac{x}{x} = x - 1;\ \ \ \]
\[\ x \neq 0\]
\[\textbf{в)}\ y = \frac{x^{2} - 3x}{x} - \frac{2x^{2} - 2}{x^{2} - 1} =\]
\[= \frac{x(x - 3)}{x} - \frac{2 \cdot \left( x^{2} - 1 \right)}{x^{2} - 1} =\]
\[= x - 3 - 2 =\]
\[= x - 5;\ \ \ \ \ \ x \neq 0;\ \ x \neq 1;\ \ x = - 1.\]