A.\(2m\)
B.\(3,7m\)
C.\(1,7m\)
D.\(2,7m\)

A.\(\dfrac{{2a\sqrt 5 }}{3}\)
B.\(\dfrac{{a\sqrt 5 }}{3}\)
C.\(\dfrac{{a\sqrt 5 }}{6}\)
D.\(\dfrac{a}{3}\)

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

A.\(\dfrac{1}{5}\)
B.\(\dfrac{1}{{10}}\)
C.\(\dfrac{2}{5}\)
D.\(\dfrac{3}{{10}}\)

A.\(\dfrac{{\sqrt 3 }}{3}\)
B.\(\sqrt 2 \)
C.\(\sqrt 3 \)
D.\(\sqrt 6 \)

A.\(\left( {2;4} \right)\)
B.\(\left( {3;4} \right)\)
C.\(\left[ {3;4} \right]\)
D.\(\left[ {2;4} \right]\)

A.\(y < z < x\)
B.\(x < y < z\)
C.\(z < x < y\)
D.\(z < y < x\)

A.\(\dfrac{7}{2}\)
B.\(\dfrac{7}{6}\)
C.\(\dfrac{7}{9}\)
D.\(\dfrac{7}{3}\)

A.\(2\)
B.\(16\)
C.\(8\)
D.\(4\)

A.\(4\sqrt 3 \)
B.\(2\sqrt 3 \)
C.\(\sqrt 3 \)
D.\(8\sqrt 3 \)