A.\(S = \left( { - \infty ;\,\, - \dfrac{2}{3}} \right] \cup \left( {\dfrac{1}{2};\,\,2} \right)\)
B.\(S = \left( { - \infty ;\,\, - \dfrac{1}{2}} \right] \cup \left[ {\dfrac{2}{3};\,\,2} \right]\)
C.\(S = \left( { - \infty ;\,\, - \dfrac{2}{3}} \right] \cup \left[ {\dfrac{1}{2};\,\,2} \right]\)
D.\(S = \left( { - \infty ;\,\, - \dfrac{2}{3}} \right) \cup \left[ {\dfrac{1}{2};\,\,2} \right]\)

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

A.\(6\)
B.\(\dfrac{{32}}{3}\)
C.\( - \dfrac{{32}}{3}\)
D.\(24\)

A.\(39\)
B.\(42\)
C.\(40\)
D.\(47\)

A.
B.
C.
D.

A.\(m \in \left( { - \infty ;\,\, - 1} \right] \cup \left[ {7;\,\, + \infty } \right)\)
B.\(m \in \left( { - \infty ;\,\, - 1} \right) \cup \left( {7;\,\, + \infty } \right)\)
C.\(m \in \left( { - \infty ;\,\, - 7} \right] \cup \left[ {1;\,\, + \infty } \right)\)
D.\(m \in \left( { - \infty ;\,\, - 7} \right) \cup \left( {1;\,\, + \infty } \right)\)

A.\(1 \le m \le 3\)
B.\(1 < m < 3\)
C.\(\left[ \begin{array}{l}m < 1\\m > 3\end{array} \right.\)
D.\(\left[ \begin{array}{l}m \le 1\\m \ge 3\end{array} \right.\)

A.\(m <  - \dfrac{3}{2}\)
B.\(m >  - \dfrac{3}{2}\) và \(m \ne 0\)
C.\( - \dfrac{3}{2} < m < 0\)
D.\(m >  - \dfrac{3}{2}\)

A.\(\dfrac{{ - 6 - 2\sqrt {19} }}{3} < m < \dfrac{{ - 6 + 2\sqrt {19} }}{3}\)
B.\(\dfrac{{ - 6 - 2\sqrt {19} }}{5} < m < \dfrac{{ - 6 + 2\sqrt {19} }}{5}\)
C.\(\dfrac{{ - 6 - 19\sqrt 2 }}{5} < m < \dfrac{{ - 6 + 19\sqrt 2 }}{5}\)
D.\(\dfrac{{ - 6 - 19\sqrt 2 }}{3} < m < \dfrac{{ - 6 + 19\sqrt 2 }}{3}\)

A.\(3\)
B.\(4\)
C.\(5\)
D.\(6\)