Đề thi HK2 môn Toán lớp 10 Sở GD và ĐT Thái Bình...

A \(\left\{ \begin{array}{l}a < 0\\\Delta  \le 0\end{array} \right.\)

B \(\left\{ \begin{array}{l}a \le 0\\\Delta  < 0\end{array} \right.\)

C \(\left\{ \begin{array}{l}a < 0\\\Delta  \ge 0\end{array} \right.\)

D \(\left\{ \begin{array}{l}a > 0\\\Delta  \le 0\end{array} \right.\)

A \({x^2} + 2{y^2} - 4x - 8y + 1 = 0.\)

B \({x^2} + {y^2} - 4x + 6y - 12 = 0.\)

C \({x^2} + {y^2} - 2x - 8y + 20 = 0.\)

D \(4{x^2} + {y^2} - 10x - 6y - 2 = 0.\)

A \(\frac{{{x^2}}}{2} + \frac{{{y^2}}}{3} = 1\)

B \(\frac{{{x^2}}}{9} - \frac{{{y^2}}}{8} = 1\)

C \(\frac{x}{9} + \frac{y}{8} = 1\)

D \(\frac{{{x^2}}}{9} + \frac{{{y^2}}}{1} = 1\)

A \(x =  - 3\)    

B \(x = \frac{5}{2}\)  

C \(x = 4\)

D \(x = 2\)

A \(M\left( {\frac{7}{2};0} \right)\) và \(M\left( {1;0} \right)\).          

B \(M\left( {\sqrt {13} ;0} \right)\).                   

C \(M\left( {4;0} \right)\).           

D \(M\left( {2;0} \right)\).

A \(I\left( { - 2; - 3} \right).\)

B \(I\left( { - 2; - 3} \right).\)

C \(I\left( {4;6} \right).\)

D \(I\left( { - 4; - 6} \right).\)

A \({x^2} + {y^2} + 25x + 19y - 49 = 0.\)

B \(2{x^2} + {y^2} - 6x + y - 3 = 0.\)

C \({x^2} + {y^2} - 6x + y - 1 = 0.\)

D \({x^2} + {y^2} - 6x + xy - 1 = 0.\)

A \(\tan \left( {\alpha  + \beta } \right) = 2\cot \alpha \).

B \(\tan \left( {\alpha  + \beta } \right) = 2\cot \beta \).

C \(\tan \left( {\alpha  + \beta } \right) = 2\tan \beta \).

D \(\tan \left( {\alpha  + \beta } \right) = 2\tan \alpha \).

A \(x + 2y + 1 = 0.\) 

B \(2x - y = 0.\)

C \( - x + 2y + 1 = 0.\)

D \( - 2x + 4y - 1 = 0.\)

A \({\rm{cos}}\left( {a + \frac{\pi }{3}} \right) = c{\rm{os}}a + \frac{1}{2}\).

B \({\rm{cos}}\left( {a + \frac{\pi }{3}} \right) = \frac{1}{2}\sin a - \frac{{\sqrt 3 }}{2}\cos a\).

C \({\rm{cos}}\left( {a + \frac{\pi }{3}} \right) = \frac{{\sqrt 3 }}{2}\sin a\, - \frac{1}{2}\cos a\).

D \({\rm{cos}}\left( {a + \frac{\pi }{3}} \right) = \frac{1}{2}{\rm{cos}}a - \frac{{\sqrt 3 }}{2}\sin a\).

A \(A = 0\)

B \(A =  - 2\cot x\)

C \(A = \sin 2x\)         

D \(A =  - 2\sin x\)

A \(\frac{{{\rm{7}}\sqrt 2 }}{2}.\)

B \({\rm{8}}{\rm{.}}\)

C \({\rm{8}}\sqrt 3 \,.\)

D \({\rm{80}}\sqrt 3 \,.\)

A \(\frac{{\sqrt {21} }}{3}\)

B \(-\frac{{\sqrt {21} }}{5}\)

C \(\frac{{\sqrt {21} }}{5}\)

D \( - \frac{{\sqrt {21} }}{2}\)

A \(\overrightarrow n ( - 2; - 1)\)

B \(\overrightarrow n (2; - 1)\)    

C \(\overrightarrow n ( - 1;2)\)

D \(\overrightarrow n  = \left( {1;\,2} \right)\)

A \(21\)            

B \(23\)            

C \(22\)            

D \(20\)

A \(S = \left( {0; + \infty } \right)\)

B \(S = \left( { - \infty ;0} \right)\)

C \(S = \left( { - 4;2} \right)\)

D \(S = (2; + \infty )\)

A \(\frac{{\sqrt {10} }}{{10}}.\)

B \(\frac{3}{{10}}\).

C \(\frac{3}{5}.\)

D \(\frac{{3\sqrt {10} }}{{10}}.\)

A \(\frac{{{x^2}}}{{25}} + \frac{{{y^2}}}{4} = 1.\)

B \(\frac{{{x^2}}}{{29}} + \frac{{{y^2}}}{{25}} = 1.\)

C \(\frac{{{x^2}}}{{25}} + \frac{{{y^2}}}{{21}} = 1.\)

D \(\frac{{{x^2}}}{{25}} + \frac{{{y^2}}}{{29}} = 1.\)

A \(f\left( x \right) > 0\) với \(\forall x \in \left( { - \infty ;\frac{{20}}{{23}}} \right)\)

B \(f\left( x \right) > 0\) với \(\forall x >  - \frac{5}{2}\)

C \(f\left( x \right) > 0\) với \(\forall x \in R\)

D \(f\left( x \right) > 0\) với \(\forall x \in \left( {\frac{{20}}{{23}}; + \infty } \right)\)

A \(2x - y - 3 = 0\)

B \(x - 2y = 0\)

C \(x + 2y - 4 = 0\)

D \(x - y - 1 = 0\)

A \(a.\,\,\frac{1}{7}\)   

B \(a.\,\,\frac{1}{8}\)   

C \(a.\,\,\frac{1}{9}\)   

D \(a.\,\,\frac{1}{10}\)   

A \(7x - y - 33 = 0\)

B \(7x + y + 33 = 0\)

C \(7x + y - 33 = 0\)

D \(7x - y + 33 = 0\)

A \(A\left( {2;3} \right),\,\,D\left( { - 3;8} \right)\)

B \(A\left( {2;-3} \right),\,\,D\left( { - 3;8} \right)\)

C \(A\left( { - 2; - 3} \right),\,\,D\left( {3; - 8} \right)\)

D \(A\left( { - 2;3} \right),\,\,D\left( {3;8} \right)\)