Đề thi HK2 Toán 8 - THCS Trần Đăng Ninh - Hà Nội -...

A \(\begin{array}{l}a)\,\,x = 1\\b)\,\,x =  - \frac{6}{5}\end{array}\)

B \(\begin{array}{l}a)\,\,x =  - 1\\b)\,\,\left[ \begin{array}{l}x =  - 4\\x =  - \frac{6}{5}\end{array} \right.\end{array}\)

C \(\begin{array}{l}a)\,\,x = 1\\b)\,\,\left[ \begin{array}{l}x = 4\\x = \frac{6}{5}\end{array} \right.\end{array}\)

D \(\begin{array}{l}a)\,\,x =  - 1\\b)\,\,x = \frac{6}{5}\end{array}\)

A \(S = \left\{ {x \in \mathbb{R}|\,x \ge \frac{7}{5}} \right\}.\)

B \(S = \left\{ {x \in \mathbb{R}|\,x \le \frac{5}{7}} \right\}.\)

C \(S = \left\{ {x \in \mathbb{R}|\,x \le \frac{7}{5}} \right\}.\)

D \(S = \left\{ {x \in \mathbb{R}|\,x \ge \frac{5}{7}} \right\}.\)

A \(3000\)

B \(3120\)

C \(3210\)

D \(3200\)

A \(\left( {x,y} \right) = \left( { - 4;3} \right)\)

B \(\left( {x,y} \right) = \left( {4; - 3} \right)\)

C \(\left( {x,y} \right) = \left( {3; - 4} \right)\)

D \(\left( {x,y} \right) = \left( { - 3;4} \right)\)