Cho \(\overrightarrow u  = \left( {0; - 1} \right)\) thì:

\(\left( {0;1} \right).\)

\(\left( {1; - 1} \right).\)

\(\left( { - 1;1} \right).\)

\(\left( {1;1} \right).\)

\(\overrightarrow {OM}  = \left( { - 3; - 1} \right)\)

\(\overrightarrow {OM}  = \left( {3;1} \right)\)

\(\overrightarrow {MO}  = \left( { - 3;1} \right)\)

\(\overrightarrow {OM}  = \left( { - 3;1} \right)\)

\(\overrightarrow {OM}  =  - 2\overrightarrow i  + 4\overrightarrow j \)

\(\overrightarrow {OM}  = 2\overrightarrow i  - 4\overrightarrow j \)

\(\overrightarrow {OM}  = 2\overrightarrow j  - 4\overrightarrow i \)

\(\overrightarrow {OM}  =  - 2\overrightarrow i  - 4\overrightarrow j \)

\(I\left( {6;4} \right).\)

\(I\left( {2;10} \right).\)

\(I\left( {3;2} \right).\)

\(I\left( {8; - 21} \right).\)

\(G\left( { - 3; - 3} \right).\)

\(G\left( {\dfrac{9}{2};\dfrac{9}{2}} \right).\)

\(G\left( {9;9} \right).\)

\(G\left( {3;3} \right).\)

\(C\left( {6; - 3} \right).\)

\(C\left( { - 6;3} \right).\)

\(C\left( { - 6; - 3} \right).\)

\(C\left( { - 3;6} \right).\)