Đề thi online - Hệ phương trình không mẫu mực - Có...

A $\left( {x;y} \right) = \left( {1;1} \right),\left( {\frac{{ - 1}}{2}; - 2} \right).$

B $\left( {x;y} \right) = \left( {1;-1} \right),\left( {\frac{{ - 1}}{2}; - 2} \right).$

C $\left( {x;y} \right) = \left( {1;1} \right),\left( {\frac{{ - 1}}{2}; 2} \right).$

D $\left( {x;y} \right) = \left( {1;-1} \right),\left( {\frac{{ 1}}{2}; - 2} \right).$

A $\left( {x;y} \right) = \left( {-1;0} \right),\left( { 1;2} \right)$

B $\left( {x;y} \right) = \left( {1;0} \right),\left( { - 1;-2} \right)$

C $\left( {x;y} \right) = \left( {1;1} \right),\left( { - 1;2} \right)$

D $\left( {x;y} \right) = \left( {1;0} \right),\left( { - 1;2} \right)$

A $\left( {x;y} \right) = \left( {-1;1} \right),\left( {2;0} \right)$

B $\left( {x;y} \right) = \left( {1;1} \right),\left( {2;0} \right)$

C $\left( {x;y} \right) = \left( {1;1} \right),\left( {-2;0} \right)$

D $\left( {x;y} \right) = \left( {-1;1} \right),\left( {-2;0} \right)$

A $\left( {x;y} \right) = \left( {1;1} \right),\left( {\frac{{415}}{{51}};\frac{{17}}{3}} \right)$

B $\left( {x;y} \right) = \left( {1;-1} \right),\left( {\frac{{415}}{{51}};\frac{{17}}{3}} \right)$

C $\left( {x;y} \right) = \left( {1;1} \right),\left( {\frac{{-415}}{{51}};\frac{{17}}{3}} \right)$

D $\left( {x;y} \right) = \left( {-1;1} \right),\left( {\frac{{-415}}{{51}};\frac{{17}}{3}} \right)$

A $\left( {x;y} \right) = \left( {\frac{-7}{8};\frac{-3}{8}} \right),\,\,\left( {\frac{{13}}{8}; - \frac{3}{8}} \right)$

B $\left( {x;y} \right) = \left( {\frac{-7}{8};\frac{3}{8}} \right),\,\,\left( {\frac{{-13}}{8}; - \frac{3}{8}} \right)$

C $\left( {x;y} \right) = \left( {\frac{7}{8};\frac{3}{8}} \right),\,\,\left( {\frac{{13}}{8}; - \frac{3}{8}} \right)$

D $\left( {x;y} \right) = \left( {\frac{7}{8};\frac{3}{8}} \right),\,\,\left( {\frac{{-13}}{8}; \frac{3}{8}} \right)$

A $\left( {x;y} \right) = \left( {-1;-1} \right)$.

B $\left( {x;y} \right) = \left( {1;-1} \right)$.

C $\left( {x;y} \right) = \left( {-1;1} \right)$.

D $\left( {x;y} \right) = \left( {1;1} \right)$.

A $\left( {x;y} \right) = \left( {-7;\frac{{111}}{{98}}} \right)$

B $\left( {x;y} \right) = \left( {7;\frac{{111}}{{98}}} \right)$

C $\left( {x;y} \right) = \left( {7;\frac{{-111}}{{98}}} \right)$

D $\left( {x;y} \right) = \left( {-7;\frac{{-111}}{{98}}} \right)$

A $\left( {x;y} \right) = \left( {5;-2} \right)$

B $\left( {x;y} \right) = \left( {-5;2} \right)$

C $\left( {x;y} \right) = \left( {2;5} \right)$

D $\left( {x;y} \right) = \left( {5;2} \right)$

A $\left( {x;y} \right) = \left( {3;3} \right)$

B $\left( {x;y} \right) = \left( {-3;3} \right)$

C $\left( {x;y} \right) = \left( {3;-3} \right)$

D $\left( {x;y} \right) = \left( {-3;-3} \right)$

A $x = y = z = 6$

B $x = y = z = 7$

C $x = y = z = 8$

D $x = y = z = 9$