\[\boxed{\mathbf{237}\mathbf{.}}\]
\[1)\ 2^{x} = 3 - 2x - x^{2}\]
\[y = 2^{x} - показательная\ \]
\[функция.\]
\[x\] | \[0\] | \[1\] | \[2\] |
---|---|---|---|
\[y\] | \[1\] | \[3\] | \[9\] |
\[y = 3 - 2x - x^{2} - уравнение\ \]
\[параболы.\]
\[x_{0} = - \frac{b}{2a} = - \frac{- 2}{- 2} = - 1\ \]
\[\text{\ \ }y_{0} = 3 + 2 - 1 = 4.\]
\[x\] | \[- 4\] | \[- 3\] | \[- 2\] | \[0\] | \[1\] | \[2\] |
---|---|---|---|---|---|---|
\[y\] | \[- 5\] | \[0\] | \[3\] | \[3\] | \[0\] | \[- 5\] |
\[Ответ:\ \ x_{1} \approx - 3\ \ \ x_{2} \approx 0,6.\]
\[2)\ 3^{- x} = \sqrt{x}\]
\[y = 3^{- x} = \left( \frac{1}{3} \right)^{x} -\]
\[показательная\ функция.\]
\[x\] | \[- 2\] | \[- 1\] | \[0\] |
---|---|---|---|
\[y\] | \[9\] | \[3\] | \[1\] |
\[y = \sqrt{x} - уравнение\ ветви\ \]
\[параболы.\]
\[x \geq 0\ \text{\ \ }y \geq 0.\]
\[x\] | \[0\] | \[1\] | \[4\] | \[9\] |
---|---|---|---|---|
\[y\] | \[0\] | \[1\] | \[2\] | \[3\] |
\[Ответ:\ \ x \approx 0,4.\]
\[3)\ \left( \frac{1}{3} \right)^{x} = - \frac{3}{x}\]
\[y = \left( \frac{1}{3} \right)^{x} - показательная\ \]
\[функция.\]
\[x\] | \[- 2\] | \[- 1\] | \[0\] |
---|---|---|---|
\[y\] | \[9\] | \[3\] | \[1\] |
\[y = - \frac{3}{x} - уравнение\ \]
\[гиперболы.\]
\[x \neq 0\ \text{\ \ }y \neq 0.\]
\[x\] | \[- 3\] | \[- 1\] | \[1\] | \[1\] |
---|---|---|---|---|
\[y\] | \[1\] | \[3\] | \[- 3\] | \[1\] |
\[Ответ:\ \ x = - 1.\]
\[4)\ \left( \frac{1}{2} \right)^{x} = x^{3} - 1\]
\[y = \left( \frac{1}{2} \right)^{x} - показательная\ \]
\[функция.\]
\[x\] | \[- 3\] | \[- 2\] | \[- 1\] | \[0\] |
---|---|---|---|---|
\[y\] | \[8\] | \[4\] | \[2\] | \[1\] |
\[y = x^{3} - 1 - уравнение\ \]
\[кубической\ параболы.\]
\[x_{0} = 0\ \]
\[\text{\ \ }y_{0} = 0^{3} - 1 = - 1.\]
\[x\] | \[- 2\] | \[- 1\] | \[1\] | \[2\] |
---|---|---|---|---|
\[y\] | \[- 9\] | \[- 2\] | \[0\] | \[7\] |
\[Ответ:\ \ x \approx 1,1.\]