Đề thi chính thức vào 10 môn Toán hệ chung - Chuyê...

A \(P = \frac{{2\sqrt x }}{{x - 1}}\)

B \(P = \frac{{\sqrt x }}{{x - 1}}\)

C \(P = \frac{{\sqrt x }}{{\sqrt x  - 1}}\)

D \(P = \frac{{\sqrt x }}{{\sqrt x  + 1}}\)

A \(x = 3\)

B \(x = 2\)

C \(x = 4\)

D \(x = 9\)

A \(\min A =  - 7\)

B \(\min A = 7\)

C \(\min A = 8\)

D \(\min A =  - 8\)

A \( - \frac{1}{4} < m < 2\)

B \(m >  - \frac{1}{4}\)

C \(m \le 2\)

D \( - \frac{1}{4} \le m \le 2\)

A \(S = \left\{ {\left( { - 1;\;10} \right),\;\left( {2;\;1} \right),\;\;\left( {\frac{9}{2};\,\frac{9}{4}} \right).} \right\}\)

B \(S = \left\{ {\left( { - 1;\;10} \right),\;\left( {2;\;1} \right),\;\;\left( { - \frac{9}{2}; - \frac{9}{4}} \right).} \right\}\)

C \(S = \left\{ {\left( { - 1;\;10} \right),\;\left( { - 2;\; - 1} \right),\;\;\left( {\frac{9}{2};\frac{9}{4}} \right).} \right\}\)

D \(S = \left\{ {\left( { - 1;\; - 10} \right),\;\left( { - 2;\; - 1} \right),\;\;\left( { - \frac{9}{2}; - \frac{9}{4}} \right).} \right\}\)

A \(x = \frac{1}{2}\)

B \(x = \frac{1}{3}\)

C \(x = \frac{1}{4}\)

D \(x = \frac{1}{5}\)

A \(\left( {x;\;y} \right) = \left\{ {\left( { - 1;\;0} \right);\;\left( { - 1;\; - 2} \right)} \right\}.\)

B \(\left( {x;\;y} \right) = \left\{ {\left( { - 1;\;0} \right);\;\left( {1;\;2} \right)} \right\}.\)

C \(\left( {x;\;y} \right) = \left\{ {\left( {1;\;0} \right);\;\left( {1;\;2} \right)} \right\}.\)

D \(\left( {x;\;y} \right) = \left\{ {\left( {1;\;0} \right);\;\left( { - 1;\; - 2} \right)} \right\}.\)