\[\boxed{\mathbf{966.ОК\ ГДЗ - домашка\ на}\ 5}\]
\[\textbf{а)}\ A(0;5);\ r = 3:\]
\[x^{2} + (y - 5)^{2} = 9.\]
\[\textbf{б)}\ A( - 1;2);\ r = 2:\]
\[{(x + 1)}^{2} + (y - 2)^{2} = 4.\]
\[\textbf{в)}\ A( - 3; - 7);\ r = \frac{1}{2}:\]
\[{(x + 3)}^{2} + (y + 7)^{2} = \frac{1}{4}.\]
\[\textbf{г)}\ A(4; - 3);\ r = 10:\]
\[{(x - 4)}^{2} + (y + 3)^{2} = 100.\]
\[\boxed{\mathbf{966}\mathbf{.еуроки - ответы\ на\ пятёрку}}\]
\[\mathbf{Построим\ вектроры\ }\overrightarrow{a},\ \overrightarrow{b}\ и\ \overrightarrow{c}.\]
\[\textbf{а)}\ 2\overrightarrow{a} + 3\overrightarrow{b} - 4\overrightarrow{c};\]
\[\textbf{б)}\frac{1}{2}\overrightarrow{a} - \overrightarrow{b} + \frac{1}{3}\overrightarrow{c}\text{\ .}\]