A.1
B.10
C.-1
D.11

A.\( - 5\)
B.\( - 2\)
C.\( - 1\)
D.1

A.4
B.3
C.5
D.2

A.\(\dfrac{9}{2}\)
B.\(\dfrac{9}{4}\)
C.\(\dfrac{3}{4}\)
D.\(\dfrac{{3\sqrt 3 }}{4}\)

A.\(S = \left( {0;2} \right)\)
B.\(S = \left( {0;3} \right)\)
C.\(S = \left( {3;5} \right)\)
D.\(S = \left( {3; + \infty } \right)\)

A.\({x^2} + {y^2} + {z^2} + 4x + 2y - 4z = 0\)
B.\({x^2} + {y^2} + {z^2} + 4x - 2y + 4z = 0\)
C.\({x^2} + {y^2} + {z^2} + 4x - 2y - 4z = 0\)
D.\({x^2} + {y^2} + {z^2} + 2x - y - 2z = 0\)

A.\(2x - 2y - z = 0\)
B.\(2x - 2y - z + 2 = 0\)
C.\( - 2x + 2y + z + 2 = 0\)
D.\(2x + 2y - z + 2 = 0\)

A.\(I = e\)
B.\(I = 3{e^2} - 2e\)
C.\(I = {e^2}\)
D.\(I =  - {e^2}\)

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

A.\(a < 0,\,\,b < 0,\,\,c = 0,\,\,d > 0\)
B.\(a > 0,\,\,b < 0,\,\,c > 0,\,\,d > 0\)
C.\(a < 0,\,\,b > 0,\,\,c = 0,\,\,d > 0\)
D.\(a < 0,\,\,b > 0,\,\,c > 0,\,\,d > 0\)