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 \(S=60km; t=2h\)