A.\(\dfrac{{13\sqrt {14} }}{{14}}\)
B.\(\sqrt {14} \)
C.\(\dfrac{{12}}{7}\)
D.\(\dfrac{{18}}{7}\)

A.\(0\)
B.\(3\)
C.\(1\)
D.\(2\)

A.\(2\)
B.\(\sqrt 6 \)
C.\(4\)
D.\(3\)

A.\(4\)
B.\(6\)
C.\(8\)
D.\(5\)

A.\(\dfrac{{\sqrt {46} }}{{46}}\)
B.\(\dfrac{{\sqrt {46} }}{{23}}\)
C.\(\dfrac{{3\sqrt {46} }}{{23}}\)
D.\(\dfrac{{3\sqrt {46} }}{{46}}\)

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

A.\(3\)
B.\(6\)
C.\( - 3\)
D.\( - 6\)

A.\(x = 1\)
B.\(x = 2\)
C.\(x =  - 1\)
D.\(x = 3\)

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

A.\({60^0}\)
B.\({30^0}\)
C.\({45^0}\)
D.\({90^0}\)