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A \({A_1}\left( { - 16;0} \right);\,\,{A_2}\left( {16;0} \right);\,\,{B_1}\left( {0; - 9} \right);\,\,{B_2}\left( {0;9} \right)\)

B \({A_1}\left( { - 4;0} \right);\,\,{A_2}\left( {4;0} \right);\,\,{B_1}\left( {0; - 3} \right);\,\,{B_2}\left( {0;3} \right)\)

C \({A_1}\left( { - 4;0} \right);\,\,{A_2}\left( {4;0} \right);\,\,{B_1}\left( {0; - 9} \right);\,\,{B_2}\left( {0;9} \right)\)

D \({A_1}\left( { - 16;0} \right);\,\,{A_2}\left( {16;0} \right);\,\,{B_1}\left( {0; - 3} \right);\,\,{B_2}\left( {0;3} \right)\)

A \(2;\,\,4\)

B \(4;\,\,2\)

C \(2\sqrt 2 ;\,\,4\)

D \(4;\,\,2\sqrt 2 \)

A \(6\)      

B \(2\sqrt {41} \)

C \(3\)      

D \(\sqrt {41} \)

A \({F_1}( - 2;0),\,\,{F_2}(2;0)\)

B \({F_1}( - 1;0),\,\,{F_2}(1;0)\)

C \({F_1}( - 2\sqrt 2 ;0),\,\,{F_2}(2\sqrt 2 ;0)\)

D \({F_1}( - \sqrt 2 ;0),\,\,{F_2}(\sqrt 2 ;0)\)

A \(y = {3 \over 4}x;\,\,\,y =  - {3 \over 4}x\)

B \(y = {4 \over 3}x;\,\,y =  - {4 \over 3}x\)        

C \(y = {9 \over {16}}x;\,\,\,y =  - {9 \over {16}}x\)        

D \(y = {{16} \over 9}x;\,\,\,\,y =  - {{16} \over 9}x\)

A \(e = {5 \over 4}\)

B \(e = {4 \over 5}\)        

C \(e = {3 \over 4}\)

D \(e = {4 \over 3}\)

A \({{{x^2}} \over {16}} - {{{y^2}} \over {25}} = 1\)

B \({{{x^2}} \over {25}} - {{{y^2}} \over 9} = 1\)          

C \({{{x^2}} \over 9} - {{{y^2}} \over {25}} = 1\)

D \({{{x^2}} \over {16}} - {{{y^2}} \over 9} = 1\)

A \({{{x^2}} \over {16}} - {{{y^2}} \over {25}} = 1\)

B \({{{x^2}} \over {25}} - {{{y^2}} \over 9} = 1\)          

C \({{{x^2}} \over 9} - {{{y^2}} \over {25}} = 1\)          

D \({{{x^2}} \over {16}} - {{{y^2}} \over 9} = 1\)

A \({{{x^2}} \over {16}} - {{{y^2}} \over {25}} = 1\)

B \({{{x^2}} \over {25}} - {{{y^2}} \over 9} = 1\)          

C \({{{x^2}} \over 9} - {{{y^2}} \over {25}} = 1\)

D \({{{x^2}} \over {16}} - {{{y^2}} \over 9} = 1\)

A \({{{x^2}} \over {36}} - {{{y^2}} \over {28}} = 1\)

B \({{{x^2}} \over {36}} - {{{y^2}} \over 8} = 1\)

C \({{{x^2}} \over {36}} - {{{y^2}} \over {16}} = 1\)

D \({{{x^2}} \over {16}} - {{{y^2}} \over {28}} = 1\)

A \({{{x^2}} \over {36}} - {{{y^2}} \over {64}} = 1.\)

B \({{{x^2}} \over {18}} - {{{y^2}} \over {32}} = 1\)

C \({{5{x^2}} \over 8} - {{{y^2}} \over 2} = 1\)

D \({{5{x^2}} \over {32}} - {{5{y^2}} \over {18}} = 1\)

A \({{{x^2}} \over 4} - {{{y^2}} \over 1} = 1\)   

B \({{{x^2}} \over 1} - {{{y^2}} \over 4} = 1\)

C \({{{x^2}} \over 4} - {{{y^2}} \over 4} = 1\)

D \({{{x^2}} \over 1} - {{{y^2}} \over {16}} = 1\)

A \(e = {2 \over 3}\)

B \(e = {4 \over 3}\)        

C \(e = {2 \over {\sqrt 3 }}\)       

D \(e = {4 \over {\sqrt 3 }}\)

A \({1 \over {\sqrt 2 }}\)

B \(\sqrt 2 \)

C 2

D \({1 \over 2}\)

A \({{{x^2}} \over 9} - {{{y^2}} \over 7} = 1\)

B \({{{x^2}} \over 9} - {{{y^2}} \over {17}} = 1\)          

C \({{{x^2}} \over {16}} - {{{y^2}} \over {17}} = 1\)

D \({{{x^2}} \over 9} - {{{y^2}} \over {16}} = 1\)

A \({{{x^2}} \over 9} - {{{y^2}} \over 7} = 1\)

B \({{{x^2}} \over 9} - {{{y^2}} \over {17}} = 1\)

C \({{{x^2}} \over {16}} - {{{y^2}} \over {17}} = 1\)

D \({{{x^2}} \over 9} - {{{y^2}} \over {16}} = 1\)

A \(\cos \varphi  = {{\left| {{b^2} - {a^2}} \right|} \over {{a^2} + {b^2}}}\)    

B \(\cos \varphi  = {{\left| {{b^2} - {a^2}} \right|} \over {2\sqrt {{a^2} + {b^2}} }}\)

C \(\cos \varphi  = {{\left| {{b^2} - {a^2}} \right|} \over {4\left( {{a^2} + {b^2}} \right)}}\)

D \(\cos \varphi  = {{4\left| {{b^2} - {a^2}} \right|} \over {\sqrt {{a^2} + {b^2}} }}\)

A \(e = 2\) hoặc \(e = {2 \over {\sqrt 3 }}\). 

B \(e = 2\) hoặc \(e = {4 \over {\sqrt 3 }}\). 

C \(e = 1\) hoặc \(e = {2 \over {\sqrt 3 }}\). 

D \(e = 1\) hoặc \(e = {4 \over {\sqrt 3 }}\)

A \(y = 2x,\,\,\,y =  - 2x\)

B \(y = 5x,\,\,\,y =  - 5x\)

C \(y = x,\,\,\,y =  - x\)

D \(y = 12x,\,\,\,y =  - 12x\)

A \(k = 1\)

B \(k = \sqrt 2 \)

C \(k = {b \over a}\)       

D \(k = {a \over b}\)