Đề thi HKI môn Toán lớp 10 - Đề số 5 - Có lời giải...

A 4

B 5

C 6

D 7

A \(x \ge 3\) và \(x \ne 4\) 

B x < 3  và \(x \ne  - 4\) 

C \(x \le 3\) và \(x \ne  - 4\)

D x > 3 và \(x \ne 4\)

A \(\left( {2; - 4} \right)\)

B \(\left( {4; - 8} \right)\)

C \(\left( { - 8; - 2} \right)\)

D \(\left( { - 4;2} \right)\)

A \(\left( { - 2;5} \right] \cup \left( {1;9} \right) = \left( { - 2;9} \right)\)

B \(R\backslash \left( {1; + \infty } \right) = \left( { - \infty ;1} \right)\)

C \(\left( { - 2;5} \right] \cap \left( {1;9} \right) = \left( {1;5} \right]\)

D \(\left( { - 2;5} \right] \cap \left( { - 9; - 2} \right) = \emptyset \)

A \(m =  - 3\)

B  m = 3

C \(m =  - 1\)

D \(m =  - 5\)

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

B \(y = {x^2} - 2x\)

C \(y = {\left( {x - 1} \right)^2}\)

D \(y = 2x + 4\)

A  - 12 

B -9         

C

-4

D 2

A -30       

B  -10     

C 6

D 2

A \(\left( { - 1;9} \right)\)

B \(\left( { - 9;7} \right)\)

C \(\left( {9; - 7} \right)\)

D \(\left( {1; - 9} \right)\)

A \( - 2\sqrt 2 \)

B \(\sqrt 2 \)

C \( - \sqrt 2 \)

D \(2\sqrt 2 \)

A \(\left( {1;1} \right)\)

B \(\left( { - 3;7} \right)\)

C \(\left( {3; - 7} \right)\)

D \(\left( { - 3; - 7} \right)\)

A 8

B 9

C 7

D 6

A 2

B 5

C 3

D 4

A 29

B 13

C -26

D \(5\sqrt {33}\)

A 8

B \(8\sqrt 2 \)

C  16

D \(4\sqrt 2 \)

A \(\left[ {0; + \infty } \right)\backslash \left\{ 2 \right\}\) 

B \(\left( {0; + \infty } \right)\backslash \left\{ 4 \right\}\)

C \(R\backslash \left\{ 4 \right\}\)

D \(\left[ {0; + \infty } \right)\backslash \left\{ 4 \right\}\)

A \(\left[ {1;2} \right]\)

B \(\left\{ {1;2} \right\}\) 

C \(\left\{ { - 1;1;2} \right\}\)

D \(\left\{ { - 1;2} \right\}\)

A m = 4

B m = 5

C m = 6

D m = 7 

A \({x^2} + {y^2} + \frac{1}{x} + \frac{1}{y} \ge 2\left( {\sqrt x  -\sqrt y } \right).\)

B \({x^2} + {y^2} + \frac{1}{x} + \frac{1}{y} \ge 2\left( {\sqrt x  + \sqrt y } \right).\)

C \({x^2} + {y^2} + \frac{1}{x} + \frac{1}{y} \ge 3\left( {\sqrt x  + \sqrt y } \right).\)

D \({x^2} + {y^2} + \frac{1}{x} + \frac{1}{y} \ge 5\left( {\sqrt x  + \sqrt y } \right).\)

A \(\overrightarrow {AB} .\overrightarrow {BC}  =  - 65\) ; \(M(14;0)\)

B \(\overrightarrow {AB} .\overrightarrow {BC}  =  - 60\) ; \(M(12;0)\)

C \(\overrightarrow {AB} .\overrightarrow {BC}  =  - 55\) ; \(M(14;2)\)

D \(\overrightarrow {AB} .\overrightarrow {BC}  =  - 64\) ; \(M(14;0)\)