Đề thi HK2 Toán 9 - Quận Phú Nhuận - TP Hồ Chí Min...

A \(S = \left\{ { - \sqrt 2 ;\,\,\sqrt 2 } \right\}.\)

B \(S = \left\{ { - 2\sqrt 2 ;\,\,2\sqrt 2 } \right\}.\)

C \(S = \left\{ { - 2;\,\,2} \right\}.\)

D \(S = \left\{ { - 1;\,\,1} \right\}.\)

A \(S = \left\{ {2;\,\,\frac{1}{2}} \right\}.\)

B \(S = \left\{ { - 2;\,\, - \frac{1}{2}} \right\}.\)

C \(S = \left\{ { - 2;\,\,\frac{1}{2}} \right\}.\)

D \(S = \left\{ {2;\,\, - \frac{1}{2}} \right\}.\)

A \(\left( {x;\,y} \right) = \left( {4; - 1} \right).\)

B \(\left( {x;\,y} \right) = \left( { - 1;6} \right).\)

C \(\left( {x;\,y} \right) = \left( {3; - 2} \right).\)

D \(\left( {x;\,y} \right) = \left( {2; - 3} \right).\)

A \({\rm{b)}}\,\,\left( { - 4; - 8} \right);\,\,\left( {1; - \frac{1}{2}} \right).\)

B \({\rm{b)}}\,\,\left( {4; - 8} \right);\,\,\left( { - 1; - \frac{1}{2}} \right).\)

C \({\rm{b)}}\,\,\left( { - 4;8} \right);\,\,\left( { - 1;\frac{1}{2}} \right).\)

D \({\rm{b)}}\,\,\left( {4;8} \right);\,\,\left( {1;\frac{1}{2}} \right).\)

A \({\rm{b)}}\,\,m = \frac{{ - 4}}{5}.\)

B \({\rm{b)}}\,\,m = \frac{4}{5}.\)

C \({\rm{b)}}\,\,m = \frac{5}{4}.\)

D \({\rm{b)}}\,\,m = \frac{{ - 5}}{4}.\)

A \(2\) lít

B \(3\) lít

C \(4\) lít

D \(5\) lít

A \(3,9\) km.

B \(3,8\) km.

C \(3,7\) km.

D \(3,6\) km.