Đề thi HK2 Toán 9 - Quận Bình Thạnh - TP Hồ Chí Mi...

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

B \(\left[ \begin{array}{l}x =  - 3\\x =  - \frac{5}{3}\end{array} \right.\)

C \(\left[ \begin{array}{l}x = 3\\x = \frac{5}{3}\end{array} \right.\)

D \(\left[ \begin{array}{l}x = 3\\x =  - \frac{5}{3}\end{array} \right.\)

A \(x =  \pm \frac{1}{2}\)

B \(x =  \pm 1\)        

C \(x =  \pm \frac{{\sqrt 2 }}{2}\)

D \(x =  \pm \sqrt 2 \)

A b) \(A\left( {2; - 2} \right)\) và \(B\left( {4; - 8} \right)\)

B b) \(A\left( { - 2;2} \right)\) và \(B\left( {4; - 8} \right)\)

C b) \(A\left( { - 2;2} \right)\) và \(B\left( { - 4; - 8} \right)\)

D b) \(A\left( {2; - 2} \right)\) và \(B\left( { - 4; - 8} \right)\)

A \(300{m^2}.\)

B \(200{m^2}.\)

C \(250{m^2}.\)

D \(150{m^2}.\)

A \(y = 1410 + 30x\)

B \(y = 1410 - 30x\)

C \(y = 1410 + 15x\)

D \(y = 1410 - 15x\)

A \(45\)

B \(46\)

C \(47\)

D \(48\)

A \(\begin{array}{l}AB = 3\,\,\left( {cm} \right)\,\,;\,\,AC = 3\sqrt 3 \,\,\left( {cm} \right)\\S = \frac{{9\pi  - 9\sqrt 3 }}{2}\,\,\left( {c{m^2}} \right)\end{array}\)

B \(\begin{array}{l}AB = 2\,\,\left( {cm} \right)\,\,;\,\,AC = 2\sqrt 2 \,\,\left( {cm} \right)\\S = 2\pi  - 2\sqrt 2 \,\,\left( {c{m^2}} \right)\end{array}\)

C \(\begin{array}{l}AB = 3\,\,\left( {cm} \right)\,\,;\,\,AC = 3\sqrt 2 \,\,\left( {cm} \right)\\S = \frac{{9\pi  - 9\sqrt 2 }}{2}\,\,\left( {c{m^2}} \right)\end{array}\)

D \(\begin{array}{l}AB = 2\,\,\left( {cm} \right)\,\,;\,\,AC = 2\sqrt 3 \,\,\left( {cm} \right)\\S = 2\pi  - 2\sqrt 3 \,\,\left( {c{m^2}} \right)\end{array}\)

A \(m \le 4\)

B \(m \ge 4\)

C \(m \ge 2\)

D \(m \le 2\)

A \(m = 0\)

B \(m = 1\)

C \(m = 2\)

D \(m = 3\)