Giải thích các bước giải:
\(\begin{array}{l}
2)a)\overrightarrow {{u_d}} = \left( {1;0} \right)\\
d:\left\{ \begin{array}{l}
x = - 1 + t\\
y = 3
\end{array} \right.\\
b)\overrightarrow {{n_d}} = \left( {0;1} \right)\\
d:y - 1 = 0\\
c)\overrightarrow {{n_d}} = \left( {3; - 2} \right)\\
d:3\left( {x - 1} \right) - 2\left( {y - 4} \right) = 0\\
\Leftrightarrow 3x - 2y + 5 = 0\\
d)\overrightarrow {{u_d}} = \left( {5; - 2} \right)\\
d:\left\{ \begin{array}{l}
x = - 1 + 5t\\
y = - 4 - 2t
\end{array} \right.\\
e)d:y = - 3x + m\\
O\left( {0;0} \right) \in d \Rightarrow m = 0\\
\Rightarrow y = - 3x\\
f)\overrightarrow {{n_d}} = \left( { - 3;5} \right)\\
d: - 3\left( {x - 3} \right) + 5\left( {y - 4} \right) = 0\\
\Leftrightarrow - 3x + 5y - 11 = 0
\end{array}\)
