Trong mp \(Oxy\) cho \(A\left( {4;6} \right)\), \(B\left( {1;4} \right)\), \(C\left( {7;\dfrac{3}{2}} \right)\). Khẳng định nào sau đây sai

$10$

\(\dfrac{{5\sqrt 6 }}{2}\)                  

\(5\sqrt 3 \)      

\(5\sqrt 2 \)

\(\overrightarrow {GA}  + 2\overrightarrow {GM}  = \overrightarrow 0 \).

\(\overrightarrow {OA} + \overrightarrow {OB}  + \overrightarrow {OC}  = 3\overrightarrow {OG} \), với mọi điểm$O$.

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

\(\overrightarrow {AM} =  - 2\overrightarrow {MG} \).

$A \cup B = \;\{ 2;{\rm{ }}7\} ,A \cap B = \{ 4;{\rm{ }}6;{\rm{ }}8\} $

$A \cap B = \;\{ 2;{\rm{ }}7\} ,A\backslash B = \{ 1;3\} $ .

$A{\rm{ }}\backslash {\rm{ }}B{\rm{ }} = \;\{ 1;{\rm{ }}3\} ,{\rm{ }}B{\rm{ }}\backslash {\rm{ }}A{\rm{ }} = \;\{ 2;{\rm{ }}7\} $ .

$A{\rm{ }}\backslash {\rm{ }}B{\rm{ }} = \;\{ 1;{\rm{ }}3\} ,{\rm{ }}A \cup B{\rm{ }} = \{ 1;{\rm{ }}3;{\rm{ }}4;{\rm{ }}6;{\rm{ }}8\} $ .

$1$

$2$

$3$

$4$

\(\dfrac{1}{2}\).

\( - \dfrac{1}{2}\).

\(\dfrac{{\sqrt 2 }}{2}\).   

\( - \dfrac{{\sqrt 2 }}{2}\).

$n-p$

$m + p$

$m-p$

$n + p$

$\{ 3;5\} $

$\{ 1;{\rm{ }}3;{\rm{ }}5;{\rm{ }}7;{\rm{ }}8;{\rm{ }}9\} $ .

$\{ 1;{\rm{ }}7;{\rm{ }}9\} .$          

$\{ 1;{\rm{ }}3;{\rm{ }}5\} .$