Câu hỏi:

\(\overrightarrow{GA}+\overrightarrow{GB}+\overrightarrow{GC}=\overrightarrow{AB}\)

\(\overrightarrow{GA}+\overrightarrow{GB}+\overrightarrow{GC}=\vec{0}\)

\(\overrightarrow{GA}+\overrightarrow{GB}=\overrightarrow{GC}\)

\(\overrightarrow{GA}+\overrightarrow{GB}+\overrightarrow{GC}=\overrightarrow{AC}\)

\(\overrightarrow{GA}=2\overrightarrow{GI}\)

\(\overrightarrow{IG}=-\frac{1}{3}\overrightarrow{IA}\)

\(\overrightarrow{GB}+\overrightarrow{GC}=2\overrightarrow{GI}\)

\(\overrightarrow{GB}+\overrightarrow{GC}=\overrightarrow{GA}\)

\(\vec{j}=\left( 0;0 \right)\)

\(\vec{j}=\left( 0;1 \right)\)

\(\vec{j}=\left( 1;0 \right)\)

\(\vec{j}=\left( 1;1 \right)\)

\(\vec{a}=\left( -1;-4 \right)\)

\(\vec{a}=\left( 4;-1 \right)\)

\(\vec{a}=\left( -4;1 \right)\)

\(\vec{a}=\left( -1;4 \right)\)

\(\vec{c}=\left( -1;-4 \right)\)

\(\vec{c}=\left( 5;12 \right)\)

\(\vec{c}=\left( 2;5 \right)\)

\(\vec{c}=\left( 2;6 \right)\)

\({A}'\left( -2;-1 \right)\)

\({A}'\left( 1;2 \right)\)

\({A}'\left( -2;1 \right)\)

\({A}'\left( 2;-1 \right)\)

\(\overrightarrow{MN}=\left( 1;1 \right)\)

\(\overrightarrow{MN}=\left( 2;2 \right)\)

\(\overrightarrow{MN}=\left( 6;8 \right)\)

\(\overrightarrow{MN}=\left( -6;-8 \right)\)

\(I\left( 4;4 \right)\)

\(I\left( 2;2 \right)\)

\(I\left( 0;-10 \right)\)

\(I\left( 0;10 \right)\)

\(D\left( 4;3 \right)\)

\(D\left( 3;4 \right)\)

\(D\left( 4;4 \right)\)

\(D\left( 8;6 \right)\)

\(\vec{a}\cdot \vec{b}=1\)

\(\vec{a}\cdot \vec{b}=12\)

\(\vec{a}\cdot \vec{b}=7\)

\(\vec{a}\cdot \vec{b}=26\)