A.
\(\left\{ \begin{array}{l}
x > 1\\
x \ge \frac{1}{2}
\end{array} \right..\)
B.
\(\left[ \begin{array}{l}
x \ne 1\\
x \ge \frac{1}{2}
\end{array} \right..\)
C.
\(\left\{ \begin{array}{l}
x \ne 1\\
x \ge \frac{1}{2}
\end{array} \right..\)
D.
\(\left[ \begin{array}{l}
x > 1\\
x \le \frac{1}{2}
\end{array} \right..\)
A. \(\mathbb{R}\backslash \left( -2;0 \right).\)
B. \(\left( 0;+\infty \right).\)
C. \(\left[ 0;+\infty \right).\)
D. \(\left[ -2;+\infty \right).\)
A.
\(\left[ -\sqrt{3};\frac{\sqrt{2}}{8} \right].\)
B.
\(\left[ \frac{1}{2\sqrt{2}};+\infty \right).\)
C. \(\left( -\infty ;\frac{1}{2\sqrt{2}} \right].\)
D. \(\left( -\infty ;-\sqrt{3} \right]\cup \left[ \frac{1}{2\sqrt{2}};+\infty \right).\)
A. \(\left( -\infty ;2 \right)\cup \left( 3;+\infty\right).\)
B. \(\left( { - \infty ;2} \right] \cup \left( {3; + \infty } \right).\)
C. \(\left( -\infty ;2 \right]\cup \left[ 3;+\infty\right).\)
D. \(\left[ -2;3 \right].\)
A. \(m\in \mathbb{R}.\)
B. \(m\ne \frac{1}{5}.\)
C. \(m\ne -\frac{1}{5}.\)
D. \(m\ne \pm \frac{1}{5}.\)
A. \(\left( 1;+\infty \right)\backslash \left\{ 3 \right\}.\)
B. \(\left( -\infty ;1 \right).\)
C. \(\left( -\infty ;3 \right)\backslash \left\{ 1 \right\}.\)
D. \(\left( -\infty ;3 \right).\)
A.
\(m\in \mathbb{R}.\)
B.
\(-\sqrt{2}\le m\le \sqrt{2}.\)
C. \( - \sqrt 2 < m < \sqrt 2 .\)
D. \(m \in \emptyset .\)
A. \(m>\frac{1}{4}.\)
B. \(m\ge \frac{1}{4}.\)
C. \(m<\frac{1}{4}.\)
D. \(m\le \frac{1}{4}.\)
A. m>1.
B. \(m\ge 1.\)
C. \(m\le \frac{1}{2}.\)
D. \(m<\frac{1}{2}.\)
A.
\(\left( -\infty ;\frac{1}{2} \right)\cup \left( 1;+\infty \right).\)
B.
\(\left( -\infty ;\frac{1}{2} \right)\cup \left( 1;+\infty \right)\backslash \left\{ \frac{3}{4} \right\}.\)
C. \(\left( \frac{1}{2};1 \right).\)
D. \(\left( \frac{1}{2};1 \right)\backslash \left\{ \frac{4}{3} \right\}.\)
A. -2
B. 2
C. -1
D. 1
A. 41.000 VNĐ.
B. 31.000VNĐ.
C. 51.000VNĐ.
D. 21.000VNĐ.
A. \(\left( {\frac{{13}}{5};2} \right).\)
B. \(\left[ {\frac{{13}}{5};2} \right].\)
C. \(\left[ { - \frac{{13}}{5};2} \right].\)
D. \(\left( { - \frac{{13}}{5};2} \right).\)
A. \(\left[ -2;-1 \right].\)
B. \(\left( { - 2; - 1} \right) \cup \left[ {0;1} \right].\)
C. \(\left( { - 2; - 1} \right) \cup \left\{ 1 \right\}.\)
D. \(\left( { - 2; - 1} \right).\)
A. \(\left( -\infty ;2 \right]\cup \left[ 14;+\infty\right).\)
B. \(\left[ {14; + \infty } \right).\)
C. \(\left( 6+\sqrt{14};+\infty\right).\)
D. \(\left( -\infty ;6-\sqrt{14} \right]\cup \left[ 6+\sqrt{14};+\infty\right).\)
A. \(m\in \left( 0;1 \right).\)
B. \(m\in \left( 0;2 \right).\)
C. \(m\in \left[ 0;1 \right].\)
D. \(m\in \left[ 0;2 \right].\)
A. 1
B. \(\frac{7}{3}.\)
C. \(\frac{{11}}{3}.\)
D. 2
A. -1
B. 4
C. 3
D. 5
A. \(\max y=12,\min y=-2.\)
B. \(\max y=7,\min y=0.\)
C. \(\max y=8,\min y=0.\)
D. \(\max y=9,\min y=-1.\)
A.
\(m\in \left( \frac{3-\sqrt{5}}{2};\frac{3+\sqrt{5}}{2} \right).\)
B.
\(m\in \left( -\infty ;\frac{3-\sqrt{5}}{2} \right]\cup \left[ \frac{3+\sqrt{5}}{2};+\infty\right)\cup \left\{ 0 \right\}.\)
C.
\(m\in \left( -\infty ;\frac{3-\sqrt{5}}{2} \right)\cup \left( \frac{3+\sqrt{5}}{2};+\infty\right).\)
D. \(m \in \left( { - \infty ;\frac{{3 - \sqrt 5 }}{2}} \right) \cup \left( {\frac{{3 + \sqrt 5 }}{2}; + \infty } \right) \cup \left\{ 0 \right\}.\)
A.
\(\mathbb{R}.\)
B.
\(\left( { - \infty ; - 1} \right) \cup \left( {1; + \infty } \right).\)
C.
\(\left( -\infty ;-1 \right)\cup \left( 1;2 \right).\)
D. \(\left( 1;2 \right).\)
A.
\(\frac{a}{b}<\frac{a+c}{b+c}.\)
B.
\(\frac{a}{c}>\frac{a+b}{c+b}.\)
C.
\(\frac{a}{b} < \frac{{a + c}}{{b + c}}.\)
D. \(\frac{a}{c}<\frac{a+b}{c+b}.\)
A. 4
B. 9
C. 16
D. 25
A.
\(\varnothing .\)
B.
\(\left[ \frac{2}{3};4 \right].\)
C. \(\left[ \frac{2}{3};4 \right]\backslash \left\{ 1 \right\}.\)
D. {1}
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