A. \(2\sqrt 3 \)
B. \(\frac{{4\sqrt 2 }}{{\sqrt 3 }}\)
C. \(\frac{2}{{\sqrt 3 }}\)
D. 4
A. 2
B. \(\dfrac43\)
C. \(\dfrac23\)
D. 4
A. x - y + z - 1 = 0
B. x - y + z + 1 = 0
C. x - y + z = 0
D. x - y + z - 2 = 0
A. \(\overrightarrow u = \left( {1;3;5} \right)\)
B. \(\overrightarrow u = \left( { - 1;3; - 5} \right)\)
C. \(\overrightarrow u = \left( {2;1; - 1} \right)\)
D. \(\overrightarrow u = \left( {1; - 2;1} \right)\)
A. 54
B. 6
C. 9
D. 18
A. \(2\sqrt 2 \)
B. \(\frac{4}{{\sqrt 3 }}\)
C. \(\sqrt 6 \)
D. 4
A. \(\left\{ \begin{array}{l} x = t\\ y = 7 - 3t\\ z = 2t \end{array} \right.\left( {t \in R} \right)\)
B. \(\left\{ \begin{array}{l} x = t\\ y = 7 + 3t\\ z = 2t \end{array} \right.\left( {t \in R} \right)\)
C. \(\left\{ \begin{array}{l} x = - t\\ y = 7 - 3t\\ z = 2t \end{array} \right.\left( {t \in R} \right)\)
D. \(\left\{ \begin{array}{l} x = 2t\\ y = 7 - 3t\\ z = t \end{array} \right.\left( {t \in R} \right)\)
A. 1
B. 2
C. 2 hoặc 32
D. 32
A. Q(2;-1;-5)
B. P(0;0;-5)
C. N(-5;0;0)
D. M(1;1;6)
A. x + 5y + 2z + 12 = 0
B. x + 5y - 2z + 12 = 0
C. x - 5y + 2z - 12 = 0
D. x + 5y + 2z - 12 = 0
A. \(\left\{ \begin{array}{l} x = 0\\ y = 1 - t\\ z = 0 \end{array} \right.\left( {t \in R} \right)\)
B. \(\left\{ \begin{array}{l} x = 1 + 2t\\ y = - 1 + t\\ z = 0 \end{array} \right.\left( {t \in R} \right)\)
C. \(\left\{ \begin{array}{l} x = - 1 + 2t\\ y = 1 + t\\ z = 0 \end{array} \right.\left( {t \in R} \right)\)
D. \(\left\{ \begin{array}{l} x = - 1 + 2t\\ y = - 1 + t\\ z = 0 \end{array} \right.\left( {t \in R} \right)\)
A. (0;-7;0)
B. (0;-7;0) hoặc (0;8;0)
C. (0;8;0)
D. (0;7;0) hoặc (0;8;0)
A. (-1;7;5)
B. (1;7;5)
C. (1;-7;-5)
D. (1;-7;5)
A. (P) đi qua M
B. (Q) // (Oxz)
C. (R) // Oz
D. \(\left( P \right) \bot \left( Q \right)\)
A. \(\left\{ \begin{array}{l} x = 1 + 4t\\ y = 2 + 3t\\ z = 3 - 7t \end{array} \right.\left( {t \in R} \right)\)
B. \(\left\{ \begin{array}{l} x = 1 + 4t\\ y = 2 + 3t\\ z = 3 - 7t \end{array} \right.\left( {t \in R} \right)\)
C. \(\left\{ \begin{array}{l} x = 4 + t\\ y = 3 + 2t\\ z = - 7 + 3t \end{array} \right.\left( {t \in R} \right)\)
D. Đáp số khác
A. 4x + 4y + 6z - 7 = 0
B. 2x + 3y + 3z - 5 = 0
C. 4x - 4y + 6z - 23 = 0
D. 2x - 3y - z - 9 = 0
A. \(m = - 3;n = \frac{2}{3}\)
B. Không có giá trị của m và n
C. \(m = 3;n = - \frac{2}{3}\)
D. \(m = 3;n = \frac{2}{3}\)
A. -1
B. -2
C. 1
D. 3
A. 45o
B. 90o
C. 30o
D. 60o
A. 6x - 4y - 3z - 12 = 0
B. 3x - 6y - 4z + 12 = 0
C. 4x - 6y - 3z + 12 = 0
D. 4x - 6y - 3z - 12 = 0
A. \(\Delta :\frac{{x + 4}}{{ - 4}} = \frac{{y + 2}}{{ - 4}} = \frac{{z - 4}}{1}\)
B. \(\Delta :\frac{{x + 4}}{{ - 1}} = \frac{{y + 2}}{2} = \frac{{z - 4}}{1}\)
C. \(\Delta :\frac{{x + 4}}{2} = \frac{{y + 2}}{{ - 2}} = \frac{{z - 4}}{{ - 1}}\)
D. \(\Delta :\frac{{x + 4}}{3} = \frac{{y + 2}}{2} = \frac{{z - 4}}{{ - 1}}\)
A. \(\frac{x}{3} + \frac{y}{1} + \frac{z}{{ - 4}} = 1\)
B. \(\frac{x}{1} + \frac{y}{{ - 4}} + \frac{z}{3} = 1\)
C. \(\frac{x}{1} + \frac{y}{3} + \frac{z}{{ - 4}} = 1\)
D. \(\frac{x}{{ - 4}} + \frac{y}{3} + \frac{z}{1} = 1\)
A. \(\left( P \right):7x - 6y - z - 7 = 0\)
B. \(\left( P \right):7x - 6y - z + 7 = 0\)
C. \(\left( P \right):x - 3y - z + 2 = 0\)
D. \(\left( P \right):x - 3y - z + 5 = 0\)
A. \(F = \frac{{49}}{4}\)
B. \(F = \frac{{49}}{5}\)
C. \(F = \frac{{51}}{4}\)
D. \(F = \frac{{51}}{5}\)
A. \(OM = \sqrt 3 \)
B. OM = 1
C. OM = 0
D. \(OM = \sqrt {10} \)
A. 3x - 4y + z - 26 = 0
B. 2x + y - z - 1 = 0
C. 4x - 3y - z + 1 = 0
D. x + 2y - z + 6 = 0
A. \(\overrightarrow m = \left( { - 3;22; - 3} \right)\)
B. \(\overrightarrow m = \left( {3;22; - 3} \right)\)
C. \(\overrightarrow m = \left( {3;22;3} \right)\)
D. \(\overrightarrow m = \left( {3; - 22;3} \right)\)
A. \(\frac{x}{3} + \frac{y}{2} + \frac{z}{1} = 0\)
B. x + y + z - 6 = 0
C. 3x + 2y + z - 14 = 0
D. \(\frac{x}{3} + \frac{y}{2} + \frac{z}{1} = 1\)
A. 2017
B. \(\frac{{2014}}{{\sqrt 3 }}\)
C. \(\frac{{2016}}{{\sqrt 3 }}\)
D. \(\frac{{2015}}{{\sqrt 3 }}\)
A. \({{\left( x+2 \right)}^{2}}+{{\left( y+4 \right)}^{2}}+{{\left( z-5 \right)}^{2}}=40\)
B. \({{\left( x+2 \right)}^{2}}+{{\left( y+4 \right)}^{2}}+{{\left( z-5 \right)}^{2}}=82\)
C. \({{\left( x+2 \right)}^{2}}+{{\left( y+4 \right)}^{2}}+{{\left( z-5 \right)}^{2}}=58\)
D. \({{\left( x+2 \right)}^{2}}+{{\left( y+4 \right)}^{2}}+{{\left( z-5 \right)}^{2}}=90\)
A. \(\left( S \right):{{\left( x+\frac{13}{3} \right)}^{2}}+{{\left( y-\frac{7}{3} \right)}^{2}}+{{\left( z-\frac{10}{3} \right)}^{2}}=1\)
B. \(\left( S \right):{{\left( x-\frac{13}{3} \right)}^{2}}+{{\left( y-\frac{7}{3} \right)}^{2}}+{{\left( z-\frac{10}{3} \right)}^{2}}=1\)
C. \(\left( S \right):{{\left( x-\frac{13}{3} \right)}^{2}}+{{\left( y+\frac{7}{3} \right)}^{2}}+{{\left( z-\frac{10}{3} \right)}^{2}}=1\)
D. \(\left( S \right):{{\left( x-\frac{13}{3} \right)}^{2}}+{{\left( y-\frac{7}{3} \right)}^{2}}+{{\left( z+\frac{10}{3} \right)}^{2}}=1\)
A. \({{\left( x-2 \right)}^{2}}+{{\left( y+1 \right)}^{2}}+{{z}^{2}}=10\)
B. \({{\left( x-2 \right)}^{2}}+{{\left( y-1 \right)}^{2}}+{{z}^{2}}=100\)
C. \({{\left( x-2 \right)}^{2}}+{{\left( y-1 \right)}^{2}}+{{z}^{2}}=10\)
D. \({{\left( x-2 \right)}^{2}}+{{\left( y+1 \right)}^{2}}+{{z}^{2}}=100\)
A. \({{x}^{2}}+{{\left( y+1 \right)}^{2}}+{{\left( z+3 \right)}^{2}}=9\)
B. \({{x}^{2}}+{{\left( y+1 \right)}^{2}}+{{\left( z+3 \right)}^{2}}=3\)
C. \({{x}^{2}}+{{\left( y-1 \right)}^{2}}+{{\left( z+3 \right)}^{2}}=3\)
D. \({{x}^{2}}+{{\left( y-1 \right)}^{2}}+{{\left( z+3 \right)}^{2}}=9\)
A. \({{\left( x-2 \right)}^{2}}+{{\left( y-3 \right)}^{2}}+{{\left( z+1 \right)}^{2}}=289\)
B. \({{\left( x-2 \right)}^{2}}+{{\left( y-3 \right)}^{2}}+{{\left( z+1 \right)}^{2}}=298\)
C. \({{\left( x-2 \right)}^{2}}+{{\left( y+3 \right)}^{2}}+{{\left( z+1 \right)}^{2}}=289\)
D. \({{\left( x-2 \right)}^{2}}+{{\left( y-3 \right)}^{2}}+{{\left( z-1 \right)}^{2}}=289\)
A. \(R=\sqrt{2}\)
B. R = 2
C. R = 1
D. \(R=\frac{1}{2}\)
A. \(I\left( 1;-2;2 \right);\text{ }I\left( 5;2;10 \right)\)
B. \(I\left( 1;-2;2 \right);\text{ }I\left( 0;-3;0 \right)\)
C. \(I\left( 5;2;10 \right);\text{ }I\left( 0;-3;0 \right)\)
D. \(I\left( 1;-2;2 \right);\text{ }I\left( -1;2;-2 \right)\)
A. \(3x+z=0\)
B. \(3x+z+2=0\)
C. \(3x-z=0\)
D. \(x-3z=0\)
A. \(8\pi\)
B. \(4\pi \)
C. \(2\pi\)
D. \(4\pi \sqrt{2}\)
A. \(M\left( -3;2;1 \right),M\left( -1;0;5 \right)\)
B. \(M\left( 3;2;-1 \right),M\left( -1;0;5 \right)\)
C. \(M\left( 3;2;1 \right),M\left( -1;0;5 \right)\)
D. \(M\left( 3;2;1 \right),M\left( 1;0;5 \right)\)
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