A. \(I\left( -1;-2;3 \right).\)
B. \(I\left( -2;-4;6 \right).\)
C. \(I\left( 2;3;-4 \right).\)
D. \(I\left( 4;6;-8 \right).\)
A. (\vec{b}=(-1;2;0).\)
B. \(\vec{v}=(2;1;0).\)
C. \(\vec{u}=(-1;2;-5).\)
D. \(\vec{a}=(2;1;-5).\)
A.
\(\frac{x+1}{5}=\frac{y+3}{2}=\frac{z-2}{1}.\)
B.
\(\frac{x+5}{1}=\frac{y+2}{3}=\frac{z+1}{-2}.\)
C. \(\frac{x-1}{5}=\frac{y-3}{2}=\frac{z+2}{1}.\)
D. \(\frac{x-5}{1}=\frac{y-2}{3}=\frac{z-1}{-2}.\)
A. 1
B. -2
C. 2
D. -1
A.
\(I\left( 5;-4;0 \right)\)và \(R=9\)
B.
\(I\left( 5;-4;0 \right)\) và \(R=3\)
C. \(I\left( -5;4;0 \right)\) và\(R=9\)
D. \(I\left( -5;4;0 \right)\) và \(R=3\)
A. \(M\left( \frac{-1}{3};\frac{-4}{3};\frac{5}{3} \right).\)
B. \(M\left( \frac{1}{3};-\frac{4}{3};\frac{5}{3} \right).\)
C. \(M\left( \frac{-1}{3};\frac{4}{3};\frac{5}{3} \right).\)
D. \(M\left( \frac{1}{3};-\frac{4}{3};-\frac{5}{3} \right).\)
A. \(d=\frac{11\sqrt{5}}{5}.\)
B. \(d=\frac{11}{3}.\)
C. d=2.
D. \(d=\frac{11}{7}.\)
A.
\({d_1}:\left\{ \begin{array}{l}
x = 1 + 2t\\
y = 5 - 3t\\
z = 7 - 2t
\end{array} \right.,(t \in R)\)
B. \({{d}_{4}}:\frac{x-2}{2}=\frac{y+1}{-3}=\frac{z-3}{2}.\)
C.
\({d_2}:\left\{ \begin{array}{l}
x = - 2 + t\\
y = 3 - t\\
z = 2 - 3t
\end{array} \right.,(t \in R)\)
D. \({{d}_{3}}:\frac{x+1}{3}=\frac{y-2}{-1}=\frac{z+1}{1}.\)
A. \(D\left( 0;1;2 \right)\).
B. \(D\left( 0;1;-2 \right)\).
C. \(D\left( 0;-1;2 \right)\).
D. \(D\left( 0;-1;-2 \right)\)
A.
\(-2x-2y+8z-4=0.\)
B.
\(2x-2y+8z-4=0.\)
C. \(-2x-2y+8z+4=0.\)
D. \(2x-2y+8z+4=0.\)
A. Tam giác đều
B. Tam giác cân
C. Tam giác vuông cân
D. Tam giác vuông
A. ((P):x+2y+3z-14=0\)
B. \((P):x+2y+3z-11=0\)
C. \((P):x+2y+z-8=0\)
D. \((P):x+y+3z-14=0\)
A. m>21.
B. m<-13.
C. m<21.
D. m<84.
A. m=0
B. m=-3
C. m=-1
D. \(m=\frac{4}{3}.\)
A. m=2
B. m=3.
C. m=-1.
D. m=1.
A. \(m=\sqrt{46}-6.\)
B. \(m=-4,m=-6.\)
C. \(m=2,m=6.\)
D. m=2.
A. \(\left( -7;-8;-2 \right).\)
B. \(\left( 3;7;18 \right).\)
C. \(\left( -9;-11;-6 \right)\)
D. \(\left( 8;-13;23 \right).\)
A. \(\left( 0;\frac{7}{5};-\frac{6}{5} \right).\)
B. \(\left( 4;5;10 \right).\)
C. \(\left( 4;-5;10 \right).\)
D. \(\left( \frac{24}{7};-\frac{23}{7};6 \right).\)
A. (2; -1; 2)
B. (2; 2; 1)
C. (2; 2;2)
D. (-1; 2; 2)
A. \(\frac{3}{\sqrt{14}}\)
B. Kết quả khác
C. \(\frac{3}{14}\)
D. \(\frac{9}{\sqrt{14}}\)
A. \(N(1;0;3).\)
B. \(N(0;-1;3).\)
C. \(N(0;1;3).\)
D. \(N(3;1;0).\)
A. \(\left( 4;0;-2 \right).\)
B. \(\left( 2;1;-3 \right).\)
C. \(\left( -1;0;2 \right).\)
D. \(\left( 0;2;-4 \right).\)
A.
\(\frac{x-1}{5}=\frac{y-1}{-1}=\frac{z-1}{-3}\)
B.
\(\frac{x+1}{5}=\frac{y+3}{-1}=\frac{z-1}{3}\)
C. \(\frac{x-1}{5}=\frac{y-1}{2}=\frac{z-1}{3}\)
D. \(\frac{x-1}{5}=\frac{y+1}{-1}=\frac{z-1}{2}\)
A. \(BD=\sqrt{30}.\)
B. \(BD=\frac{2\sqrt{74}}{3}\cdot \)
C. \(BD=2\sqrt{30}.\)
D. \(BD=\frac{\sqrt{174}}{2}\cdot \)
A.
\(\frac{x-3}{2}=\frac{y-1}{1}=\frac{z+1}{4}\)
B.
\(\frac{x-7}{2}=\frac{y-3}{1}=\frac{z-9}{4}\)
C. \(\frac{x-2}{2}=\frac{y-1}{1}=\frac{z-3}{4}\)
D. \(\frac{x-7}{2}=\frac{y-3}{1}=\frac{z-9}{-4}\)
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