Đề thi HK2 Toán 8 - Quận Ba Đình - Hà Nội - Năm 20...

A $~S=\left\{ -2 \right\}.$

B $~S=\left\{ 2 \right\}.$

C $~S=\left\{ 2; 1 \right\}.$

D $~S=\left\{ -1; 2 \right\}.$

A $S = {\rm{ }}\{ 1; - 5\} .$

B $S = {\rm{ }}\{ 2;  - 5\} .$

C $S = {\rm{ }}\{  - 5\} .$

D $S = {\rm{ }}\{-2;   - 5\} .$

A $S = \left\{ {\frac{1}{2}} \right\}$

B $S = \left\{ {\frac{3}{2}} \right\}$

C $S = \left\{ {\frac{-3}{2}} \right\}$

D $S = \left\{ {\frac{-1}{2}} \right\}$

A $\left\{ {x|x < \frac{{ - 5}}{2}} \right\}$

B $\left\{ {x|x < \frac{{ 5}}{2}} \right\}$

C $\left\{ {x|x > \frac{{ - 5}}{2}} \right\}$

D $\left\{ {x|x > \frac{{ -3}}{2}} \right\}$

A $\left\{ {x|x \ge \frac{{ 9}}{2}} \right\}$

B $\left\{ {x|x \ge \frac{{ - 9}}{2}} \right\}$

C $\left\{ {x|x \ge \frac{{ - 5}}{2}} \right\}$

D $\left\{ {x|x \ge \frac{{ - 1}}{2}} \right\}$

A $S=60km; t=1,5h$

B $S=80km; t=2h$

C $S=80km; t=1,5h$

D $S=60km; t=2h$