Đề thi HK1 Toán 9 - Sở GD&ĐT Thái Bình - Năm 2017...

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

B \(P = \frac{{\sqrt x }}{{\sqrt x  + 2}}\)

C \(P = \frac{{\sqrt x  + 2}}{{\sqrt x  + 1}}\)

D \(P = \frac{{\sqrt x \left( {\sqrt x  + 2} \right)}}{{\sqrt x  + 1}}\)

A \(\frac{{\sqrt {2018} }}{{2018}}\)

B \(\frac{{\sqrt {2018}  - 1}}{{\sqrt {2018}  + 1}}\)

C \(\frac{{2018 - \sqrt {2018} }}{{2018}}\)

D \(1\)

A \(\begin{array}{l}1.\,\,\left[ \begin{array}{l}m = 1\\m =  - 3\end{array} \right.\\2.\,\,m = 0\end{array}\)

B \(\begin{array}{l}1.\,\,m = 3\\2.\,\,\left[ \begin{array}{l}m = 0\\m = 2\end{array} \right.\end{array}\)

C \(\begin{array}{l}1.\,\,m = 1\\2.\,\,\left[ \begin{array}{l}m = 0\\m = 2\end{array} \right.\end{array}\)

D \(\begin{array}{l}1.\,\,\left[ \begin{array}{l}m =  - 1\\m = 3\end{array} \right.\\2.\,\,m = 2\end{array}\)

A \(\left( {x;\,y} \right) = \left( {4;\,2} \right)\)

B \(\left( {x;\,y} \right) = \left( {2;\,6} \right)\)

C \(\left( {x;\,y} \right) = \left( {2;\, - 2} \right)\)

D \(\left( {x;\,y} \right) = \left( {4;\,8} \right)\)  

A \(\min Q = 1\)

B \(\min Q = 2\)

C \(\min Q = 0\)

D \(\min Q =  - 1\)

A \(x = y = 4\)

B \(x = y = 2\)

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

D \(\left( {x;\,y} \right) = \left( {4;\,8} \right)\)