Đề thi HK1 Toán 8 - Trường THPT Lương Thế Vinh - H...

A \(\frac{{ - 4x}}{{1 + x}}\)

B \(\frac{{ - 4x}}{{x - 1}}\)         

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

D \(\frac{{4x}}{{x + 1}}\)

A \(x + 3\)           

B \( - x - 3\)

C \(x - 3\)            

D \( - x + 3\)

A a) đúng, b) sai, c) sai, d) đúng

B a) sai, b) sai, c) đúng, d) đúng

C a) sai, b) đúng, c) đúng, d) sai         

D a) đúng, b) đúng, c) sai, d) sai

A \(\left( {x + y} \right)\left( {x - y - 9} \right)\)       

B \(\left( {x - y} \right)\left( {x + y - 9} \right)\)     

C \(\left( {x + y} \right)\left( {x + y + 9} \right)\)    

D \(\left( {x - y} \right)\left( {x + y + 9} \right)\)           

A \(\left( {4 + x + y} \right)\left( {4 - x - y} \right)\)       

B \(\left( {4 + x + y} \right)\left( {4 + x - y} \right)\)     

C \(\left( {4 - x + y} \right)\left( {4 + x - y} \right)\)   

D \(\left( {4 - x - y} \right)\left( {4 - x + y} \right)\)       

A \(x\left( {x + 3} \right)\left( {x - 2} \right)\)   

B \(x\left( {x - 3} \right)\left( {x - 2} \right)\)

C \(x\left( {x + 3} \right)\left( {x + 2} \right)\)

D \(x\left( {x - 3} \right)\left( {x + 2} \right)\)

A \(A = \frac{{3x}}{{x + 3}}\)    

B \(A = \frac{{3x}}{{x - 3}}\)    

C \(A = \frac{{x - 2}}{{x + 3}}\)  

D \(A = \frac{{3\left( {x - 2} \right)}}{{x + 3}}\)

A \(A = 2\)    

B \(A = 3\)   

C \(A = 4\)   

D \(A = 1\)

A \(x \in \left\{ { - 12;\, - 6;\, - 4;\,0;\,2;\,6} \right\}\)

B \(x \in \left\{ { - 12;\, - 6;\, - 4;\,0;\,6} \right\}\)

C \(x \in \left\{ { \pm 9;\, \pm 3;\, \pm 1} \right\}\)

D \(x \in \left\{ { - 9;\, - 3;\, - 1;\,3;\,9} \right\}\)

A \(\begin{array}{l}{\max _A} = 2016\\{\min _A} = 2012\end{array}\)

B \(\begin{array}{l}{\max _A} = 2020\\{\min _A} = 2016\end{array}\)

C \(\begin{array}{l}{\max _A} = 2016\\{\min _A} = 2010\end{array}\)

D \(\begin{array}{l}{\max _A} = 2018\\{\min _A} = 2014\end{array}\)