A.\(\left( {x;y} \right) = \left( {1;2} \right).\)
B.\(\left( {x;y} \right) = \left( {2;1} \right).\)
C.\(\left( {x;y} \right) = \left( {1; - 2} \right).\)
D.\(\left( {x;y} \right) = \left( {2; - 1} \right).\)

A.\(x = 2015.\)
B.\(x = 2016.\)
C.\(x = 2017.\)
D.\(x = 2018.\)

A.\(m < \dfrac{1}{{16}}\)
B.\(m > \dfrac{1}{{16}}\)
C.\(m < \dfrac{1}{4}\)
D.\(m > \dfrac{1}{4}\)

A.\(P = \dfrac{{\sqrt x  + 2}}{{\sqrt x  - 1}}\)
B.\(P = \dfrac{{\sqrt x  - 3}}{{\sqrt x  + 2}}\)
C.\(P = \dfrac{{\sqrt x  + 2}}{{\sqrt x  - 3}}\)
D.\(P = \dfrac{{\sqrt x  - 3}}{{\sqrt x  - 1}}\)

A.\(S = \left\{ {5;1} \right\}\)
B.\(S = \left\{ {5; - 1} \right\}\)
C.\(S = \left\{ { - 5; - 1} \right\}\)
D.\(S = \left\{ { - 5;1} \right\}\)

A.\(m \in \left\{ { - \dfrac{1}{4}; - \dfrac{5}{4}} \right\}\)
B.\(m \in \left\{ { - \dfrac{5}{4}; - \dfrac{7}{4}} \right\}\)
C.\(m \in \left\{ { - \dfrac{1}{4}; - \dfrac{7}{4}} \right\}\)
D.\(m \in \left\{ { - \dfrac{1}{4}; - \dfrac{3}{4}} \right\}\)

A.Xé máy: \(50km/h\) ; ô tô: \(70km/h\)
B.Xé máy: \(36km/h\) ; ô tô: \(56km/h\)
C.Xé máy: \(42km/h\) ; ô tô: \(62km/h\)
D.Xé máy: \(40km/h\) ; ô tô: \(60km/h\)

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B.
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