Câu hỏi trắc nghiệm (10 câu):
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- A. \({\left( {x + a} \right)^2} + {\left( {y + b} \right)^2} = {R^2}\)
- B. \({\left( {x - a} \right)^2} + {\left( {y - b} \right)^2} = {R^2}\)
- C. \({\left( {x - a} \right)^2} + {\left( {y + b} \right)^2} = {R^2}\)
- D. \({\left( {x + a} \right)^2} + {\left( {y - b} \right)^2} = {R^2}\)
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- A. \(I\left( {a;b} \right),R\)
- B. \(I\left( { - a; - b} \right),R\)
- C. \(I\left( {a;b} \right),{R^2}\)
- D. \(I\left( { - a; - b} \right),{R^2}\)
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- A. \(I\left( {2; - 8} \right),\;R = 2\sqrt 2 \)
- B. \(I\left( {1; - 4} \right),\;R = 3\)
- C. \(I\left( { - 1;4} \right),R = 3\)
- D. \(I\left( {1; - 4} \right),R = 2\sqrt 2 \)
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- A. \(m \in \left( { - \infty ;0} \right] \cup \left[ {1; + \infty } \right)\)
- B. \(m \in \left( { - \infty ;0} \right) \cup \left( {1; + \infty } \right)\)
- C. \(m \in \left( {0;1} \right)\)
- D. \(m \in \left[ {0;1} \right]\)
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- A. \({x^2} + {y^2} + 2x - 8y + 9 = 0\)
- B. \({x^2} + {y^2} - 2x + 8y + 9 = 0\)
- C. \({x^2} + {y^2} + 2x - 8y - 15 = 0\)
- D. \({x^2} + {y^2} - 2x + 8y - 15 = 0\)
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- A. \(-{\rm{ }}4x{\rm{ }} + {\rm{ }}3y{\rm{ }}-{\rm{ }}7{\rm{ }} = {\rm{ }}0\)
- B. \(4x{\rm{ }} + {\rm{ }}3y{\rm{ }} + {\rm{ }}1 = {\rm{ }}0\)
- C. \(3x{\rm{ }} + {\rm{ }}4y{\rm{ }}-{\rm{ }}1{\rm{ }} = {\rm{ }}0\)
- D. \(3x{\rm{ }}-{\rm{ }}4y{\rm{ }} + {\rm{ }}7{\rm{ }} = {\rm{ }}0\)
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- A. \(I\left( { - 2;{\rm{ }}1} \right),{\rm{ }}R{\rm{ }} = {\rm{ }}4\)
- B. \(I\left( {2;{\rm{ }} - 1} \right),{\rm{ }}R{\rm{ }} = {\rm{ }}4\)
- C. \(I\left( {2;{\rm{ }} - 1} \right),{\rm{ }}R{\rm{ }} = {\rm{ }}2\)
- D. \(I\left( { - 2;{\rm{ }}1} \right),{\rm{ }}R{\rm{ }} = {\rm{ }}2\)
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- A. \(I\left( {4;{\rm{ }} - 6} \right),{\rm{ }}R{\rm{ }} = {\rm{ }}4\)
- B. \(I\left( { - 2;{\rm{ }}3} \right),{\rm{ }}R{\rm{ }} = {\rm{ }}16\)
- C. \(I\left( { - 4;{\rm{ }}6} \right),{\rm{ }}R{\rm{ }} = {\rm{ }}4\)
- D. \(I( - 2;{\rm{ }}3)\;,{\rm{ }}R{\rm{ }} = {\rm{ }}4\)
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- A. \(\left( {\frac{3}{4}; - \frac{7}{4}} \right),\;R = \frac{5}{{2\sqrt 2 }}\)
- B. \(I\left( { - \frac{3}{4};\frac{7}{4}} \right),\;R = \frac{{\sqrt 2 }}{2}\)
- C. \(I\left( {\frac{3}{4}; - \frac{7}{4}} \right),\;R = 1\)
- D. \(I\left( {\frac{3}{2}; - \frac{7}{2}} \right),\;R = \sqrt {15} \)
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- A. \({x^2} + {y^2} - 2x + 4y - 15 = 0\)
- B. \({x^2} + {y^2} + 2x - 4y - 15 = 0\)
- C. \({x^2} + {y^2} + x - 2y - 15 = 0\)
- D. \({x^2} + {y^2} - x + 2y - 20 = 0\)
