Question

1. cho A(5;1), B(-2;3), C(1;0). Tính \(\overrightarrow{AB},\overrightarrow{AC}\)

2. cho A(4;3), B(-5;3), C(1;7). Tính \(\overrightarrow{AB},\overrightarrow{AC}\)

 

 

Answer 1

1: A(5;1); B(-2;3)

=>\(\overrightarrow{AB}=\left(-2-5;3-1\right)\)

=>\(\overrightarrow{AB}=\left(-7;2\right)\)

A(5;1); C(1;0)
\(\overrightarrow{AC}=\left(1-5;0-1\right)\)

=>\(\overrightarrow{AC}=\left(-4;-1\right)\)

2: A(4;3); B(-5;3)

=>\(\overrightarrow{AB}=\left(-5-4;3-3\right)\)

=>\(\overrightarrow{AB}=\left(-9;0\right)\)

A(4;3); C(1;7)

=>\(\overrightarrow{AC}=\left(1-4;7-3\right)\)

=>\(\overrightarrow{AC}=\left(-3;4\right)\)