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A \(\left[ \begin{array}{l}
x \ge 3\\
x \le - 1
\end{array} \right.\)

B \( - 1 \le x \le 3\)

C \( - 1 < x < 3\)

D \(\left[ \begin{array}{l}
x > 3\\
x < - 1
\end{array} \right.\)

A \(1 \le x \le 2\)

B \(\left[ \begin{array}{l}
x > 2\\
x \le 1
\end{array} \right.\)

C \(1 \le x < 2\)

D \(\left[ \begin{array}{l}
x \ge 2\\
x \le 1
\end{array} \right.\)

A \(x \in \backslash \left\{ 0 \right\}\)

B \(x \in \mathbb{R}\).

C \(x \ge 0\)

D \(x<0\)

A \(\left\{ \begin{array}{l}
a = 1\\
b = 1
\end{array} \right.\)

B \(\left\{ \begin{array}{l}
a = 1\\
b =- 1
\end{array} \right.\)

C \(\left\{ \begin{array}{l}
a =- 1\\
b = -1
\end{array} \right.\)

D \(\left\{ \begin{array}{l}
a =- 1\\
b = 1
\end{array} \right.\)

A \(\left\{ \begin{array}{l}
a = 1\\
b = - 1
\end{array} \right.\)

B \(\left\{ \begin{array}{l}
a = 1\\
b =  1
\end{array} \right.\)

C \(\left\{ \begin{array}{l}
a = -1\\
b = - 1
\end{array} \right.\)

D \(\left\{ \begin{array}{l}
a = -1\\
b =  1
\end{array} \right.\)

A \({f^2}\left( 3 \right) \le g\left( 2 \right)\)

B \({f^2}\left( 3 \right) = g\left( 2 \right)\)

C \({f^2}\left( 3 \right) < g\left( 2 \right)\)

D \({f^2}\left( 3 \right) > g\left( 2 \right)\)

A \(x = \dfrac{{1 \pm \sqrt {13} }}{2}\)

B \(x = \dfrac{{1 + \sqrt {13} }}{2}\)

C \(x = \dfrac{{1 - \sqrt {13} }}{2}\)

D \(x \in \emptyset\)

A \(x > 0\)

B \(x \ge 0\)

C \(x \ge 0,\,\,x \ne 1\)

D \(x \ge 0,\,\,x \ne  \pm 1\)

A \(f\left( {3 + 2\sqrt 2 } \right) = 2\sqrt 2  + 2\)

B \(f\left( {3 + 2\sqrt 2 } \right) = 2\sqrt 2  + 3\)

C \(f\left( {3 + 2\sqrt 2 } \right) = \sqrt 2  + 1\)

D \(f\left( {3 + 2\sqrt 2 } \right) = \sqrt 2  + 2\)

A \(y=4x\)

B \(y=2x\)

C \(y=x^2\)

D \(y=x\)

A \(y = 2\pi x\) 

B \(y = 4\pi x\) 

C \(y = \pi x\) 

D \(y = 6\pi x\)