\[\boxed{\mathbf{928.ОК\ ГДЗ - домашка\ на}\ 5}\]
\[\overrightarrow{a}\ \left\{ 3;7 \right\};\ \overrightarrow{b}\left\{ - 2;1 \right\};\ \overrightarrow{c}\ \left\{ 6;14 \right\};\ \]
\[\overrightarrow{d}\ \left\{ 2;\ - 1 \right\};\ \overrightarrow{e}\ \left\{ 2;4 \right\}\]
\[По\ лемме\ о\ коллинеарных\ \]
\[векторах:\]
\[1)\ \overrightarrow{a}\ и\ \overrightarrow{c}\ :\ \overrightarrow{c} = 2 \bullet \overrightarrow{a}.\]
\[2)\ \overrightarrow{b}\ и\ \overrightarrow{d}\ :\ \overrightarrow{b} = - 1 \bullet \overrightarrow{d}.\ \]
\[\mathbf{Параграф\ }2\mathbf{.\ Простейшие\ задачи\ в\ координатах}\]