20 bài tập trắc nghiệm các tập hợp số

A \(\left[ {0;2} \right]\)

B \(\left( { - 4;4} \right)\)

C \(\left[ {2;4} \right)\)   

D \(\left[ { - 4;4} \right)\)

A \(\left( {0;4} \right]\)

B \(\left( {0;4} \right)\)

C \(\left[ {3;4} \right]\)   

D \(\left[ {0;1} \right)\)

A \(\left( {1;3} \right]\)

B \(\left[ { - 4; - 2} \right)\)

C \(\left[ { - 4; - 2} \right) \cup \left( {1;3} \right]\)

D Cả A, B, C đều đúng

A \(\left( { - \infty ;1} \right) \cup \left( {3; + \infty } \right)\)

B \(\left( { - \infty ;1} \right] \cup \left[ {3; + \infty } \right)\)  

C \(\left( {1;3} \right)\)

D \(\left[ {1;3} \right]\)

A \(A \cap B = {\rm{[}} - 1;\,1),\,\,B \cup C = ( - 2;\,\,4)\backslash {\rm{\{ }}1\} ,\,\,A\backslash B = {\rm{[}}1;\,\,2)\)

B \(A \cap B = {\rm{[}} - 1;\,1),\,\,B \cup C = ( - 3;\,\,4)\backslash {\rm{\{ }}1\} ,\,\,A\backslash B = {\rm{[}}1;\,\,3)\)

C \(A \cap B = {\rm{[}} - 2;\,1),\,\,B \cup C = ( - 3;\,\,4)\backslash {\rm{\{ }}1\} ,\,\,A\backslash B = {\rm{[}}1;\,\,2)\)

D \(A \cap B = {\rm{[}} - 1;\,1),\,\,B \cup C = ( - 3;\,\,4{\rm{]}}\backslash {\rm{\{ }}1\} ,\,\,A\backslash B = {\rm{[}}1;\,\,2)\)

A \(m < 2\)

B \(m > 2\)

C \(m \le 2\)

D \(m \ge 2\)

A \(A \cup B = \left[ { - 2;4} \right)\)

B \(A \cap B = \left[ {0;2} \right]\)

C \(A\backslash B = \left( {2;4} \right)\)            

D Cả A, B, C đều đúng

A \(A = \left[ {0;{\rm{ 1}}} \right).\)

B \(A = \left[ { - 1;{\rm{ }}0} \right).\)

C \(A = \left[ { - 1;{\rm{ 1}}} \right).\)

D \(A = \left[ {1;{\rm{ }}0} \right).\)

A \(\left[ {3;\,\,4} \right]\)              

B \(\left( { - \infty ; - 2} \right) \cup \left( {3; + \infty } \right)\)     

C \(\left[ {3;\,\,4} \right)\)

D \(\left( { - \infty ; - 2} \right) \cup \left[ {3; + \infty } \right)\)  

A \(A \cup B = \left[ { - 2;2} \right] \cup \left[ {3; + \infty } \right)\)

B \(A\backslash C = \left[ {0;2} \right]\)                        

C \({\rm A} \cap {\rm B} \cap C = \phi \)          

D Cả A, B, C đều đúng

A \(A \cap B = \left[ { - 1;2} \right) \cup \left( {2;5} \right),\,\,A \cup C = \left[ { - 1; + \infty } \right),\,\,\,B\backslash C = \left( { - 2;0} \right) \cup \left( {1;2} \right)\)       

B \(A \cap B = \left[ { - 1;0} \right) \cup \left( {1;5} \right),\,\,A \cup C = \left[ { - 2; + \infty } \right),\,\,\,B\backslash C = \left( { - 3;0} \right) \cup \left( {1;2} \right)\)      

C \(A \cap B = \left[ { - 1;2} \right) \cup \left( {1;5} \right),\,\,\,A \cup C = \left[ { - 1; + \infty } \right),\,\,B\backslash C = \left( { - 3;0} \right) \cup \left( {1;2} \right)\)      

D \(A \cap B = \left[ { - 1;0} \right) \cup \left( {1;5} \right),\,\,A \cup C = \left[ { - 1; + \infty } \right),\,\,B\backslash C = \left( { - 2;0} \right) \cup \left( {1;2} \right)\)       

A \(\left[ {3;5} \right]\)

B \(\left[ {3;4} \right]\)

C \(\left( {3;5} \right)\)   

D \(\left[ {1;5} \right]\)

A \(m >  - \frac{3}{2}\)

B \(m \le  - \frac{3}{2}\)

C \(m \ge  - \frac{3}{2}\)

D \(m <  - \frac{3}{2}\)

A \(m \ge \frac{{ - 3}}{2}\)

B \(m < \frac{{ - 3}}{2}\)

C \(m \le \frac{{ - 3}}{2}\)        

D \(m > \frac{{ - 3}}{2}\)

A \(\left[ \begin{array}{l}2m - n <  - 2\\2m - n > 1\end{array} \right.\)            

B \(\left[ \begin{array}{l}m - n <  - 2\\m - 2n > 1\end{array} \right.\)

C \(\left[ \begin{array}{l}m - n <  - 2\\m - n > 1\end{array} \right.\)

D \(\left[ \begin{array}{l}m - 2n <  - 2\\m - n > 1\end{array} \right.\)

A \(\left( { - 3;\sqrt 3 } \right)\)  

B \(\emptyset \)                   

C \(\left( { - 5;\sqrt {11} } \right)\)         

D \(\left( { - 3;2} \right) \cup \left( {\sqrt 3 ;\sqrt 8 } \right)\)

A \(m < 5\)          

B \(1 < m\)

C \(1 < m < 5\)

D \(1 \le m \le 5\)

A \(0 \le m \le \frac{1}{2}\)

B \(0 \le m\)

C \(0 < m < \frac{1}{2}\)           

D \(m \le \frac{1}{2}\)

A \( - 1 < m < 3\)

B \( - 1 \le m < 3\)

C \( - 1 < m \le 3\)

D \( - 1 \le m \le 3\)

A \(\left[ \begin{array}{l}m \le  - 5\\m = 3\end{array} \right.\)

B \(m <  - 5\)       

C \(\left[ \begin{array}{l}m <  - 5\\m = 3\end{array} \right.\)

D \(m = 3\)