A.\(\left( {x;y} \right) \in \left\{ {\left( { - \sqrt 2 ;4} \right);\left( {\sqrt 2 ;4} \right);\left( {0;1} \right);\left( {1;3} \right)} \right\}\)
B.\(\left( {x;y} \right) \in \left\{ {\left( { - \sqrt 2 ;4} \right);\left( {\sqrt 2 ;4} \right);\left( {0;1} \right);\left( { - 1;3} \right)} \right\}\)
C.\(\left( {x;y} \right) \in \left\{ {\left( { - \sqrt 2 ;4} \right);\left( {\sqrt 2 ;4} \right);\left( {0;2} \right);\left( {1;3} \right)} \right\}\)
D.\(\left( {x;y} \right) \in \left\{ {\left( { - \sqrt 2 ;4} \right);\left( {\sqrt 2 ;4} \right);\left( {0;2} \right);\left( { - 1;3} \right)} \right\}\)

A.
B.
C.
D.

A.\(\dfrac{{\sqrt 2 }}{4}{\left( {\dfrac{{2a}}{{2 + \sqrt {2 - \sqrt 2 } }}} \right)^2}\)
B.\(\dfrac{{\sqrt 2 }}{4}{\left( {\dfrac{{2a}}{{2 + \sqrt {2 + \sqrt 2 } }}} \right)^2}\)
C.\(\dfrac{{\sqrt 2 }}{4}{\left( {\dfrac{{2a}}{{2 - \sqrt {2 - \sqrt 2 } }}} \right)^2}\)
D.\(\dfrac{{\sqrt 2 }}{4}{\left( {\dfrac{{2a}}{{2 - \sqrt {2 + \sqrt 2 } }}} \right)^2}\)

A.
B.
C.
D.

A.\(x = 2018\)
B.\(x = 2019\)
C.\(x = 2020\)
D.\(x = 2021\)

A.
B.
C.
D.

A.\(x \in \left\{ {4;16;36} \right\}.\)
B.\(x \in \left\{ {16;36} \right\}.\)
C.\(x \in \left\{ {4;9;16;36} \right\}.\)
D.\(x \in \left\{ {4;16} \right\}.\)

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

A.\(m = \dfrac{{3\sqrt 2  - 2}}{4}\)
B.\(m = \dfrac{{\sqrt 2  + 2}}{4}\)
C.\(m = \dfrac{{3\sqrt 2  - 4}}{4}\)
D.\(m = \dfrac{{\sqrt 2  + 4}}{4}\)

A.\(m =  - \dfrac{1}{2}\)
B.\(m =  - 1\)
C.\(m = 1\)
D.\(m = \dfrac{1}{2}\)