A.week
B.promises
C.preserve
D.social

A.\({a^2} - {b^2} =  - 2\)
B.\({a^2} - {b^2} = 10\)
C.\({a^2} - {b^2} = 13\)
D.\({a^2} - {b^2} =  - 5\)

A.\(M\left( {0; - 1;1} \right)\)
B.\(Q\left( {\dfrac{1}{2}; - \dfrac{3}{2};0} \right)\)
C.\(P\left( {3; - 4; - 5} \right)\)
D.\(N\left( {\dfrac{3}{2}; - \dfrac{5}{2};2} \right)\)

A.\(\left( {0;3} \right)\)
B.\(\left( { - 1;3} \right)\)
C.\(\left( {1;2} \right)\)
D.\(\left( {0; + \infty } \right)\)

A.\(\dfrac{{{V_1}}}{{{V_2}}} = \dfrac{4}{9}\)
B.\(\dfrac{{{V_1}}}{{{V_2}}} = \dfrac{5}{{18}}\)
C.\(\dfrac{{{V_1}}}{{{V_2}}} = \dfrac{7}{9}\)
D.\(\dfrac{{{V_1}}}{{{V_2}}} = \dfrac{5}{9}\)

A.\(T = \dfrac{1}{{2021}}\)
B.\(T = 2021\)
C.\(T = 1\)
D.\(T = \dfrac{1}{{{{2021}^5}}}\)

A.\(2\sqrt 5  + 2\sqrt 2 \)
B.\(36\)
C.\(28\)
D.\(6\sqrt 2 \)

A.\(y = \dfrac{{2x - 3}}{{\sqrt {{x^2} + 1} }}\)
B.\(y = \dfrac{{{x^2}}}{{2x + 3}}\)
C.\(y = \dfrac{{3x + 1}}{{x + \sqrt {2{x^2} - 1} }}\)
D.\(y = \dfrac{{4x - 2}}{{{x^2} - 3x + 2}}\)

A.\(\left( {\dfrac{3}{4};\dfrac{5}{4}} \right)\)
B.\(\left( {\dfrac{1}{3};\dfrac{1}{2}} \right)\)
C.\(\left( {0;\dfrac{1}{3}} \right)\)
D.\(\left( {\dfrac{1}{2};\dfrac{3}{4}} \right)\)

A.\(F\left( {\dfrac{\pi }{6}} \right) = \dfrac{1}{2}\)
B.\(F\left( {\dfrac{\pi }{6}} \right) = \dfrac{5}{4}\)
C.\(F\left( {\dfrac{\pi }{6}} \right) = \dfrac{3}{4}\)
D.\(F\left( {\dfrac{\pi }{6}} \right) = 0\)