A. \(\frac{8}{9}\)
B. \(\frac{1}{9}\)
C. \(\frac{8}{3}\)
D. \(\frac{1}{3}\)
A. \(\ln 2+1\)
B. \(\ln \frac{3}{2}\)
C. \(\ln 2\)
D. \(\frac{1}{2}\)
A. x = 1
B. \(x=1-\sqrt{3}\)
C. x = -1
D. x = 0
A. \(\ln |\cos x|+C\)
B. \(-\ln |\cos x|+C\)
C. \(\frac{1}{\cos ^{2} x}+C\)
D. \(\frac{-1}{\cos ^{2} x}+C\)
A. \(\cos x \cdot e^{\sin x}+C\)
B. \(e^{\cos x}+C\)
C. \(e^{\sin x}+C\)
D. \(e^{-\sin x}+C\)
A. \(\frac{(\pi-2) \sqrt{2}}{2}\)
B. \(-\frac{(\pi-2) \sqrt{2}}{2}\)
C. \(\frac{(\pi+2) \sqrt{2}}{2}\)
D. \(-\frac{(\pi+2) \sqrt{2}}{2}\)
A. \(I=-\int_{0}^{\pi / 4} \frac{2 t}{1+t} d t\)
B. \(I=\int_{0}^{\pi / 4} \frac{2 t}{1+t} d t\)
C. \(I=-\int_{\frac{1}{2}}^{1} \frac{2 t}{1+t} d t\)
D. \(I=\int_{\frac{1}{2}}^{1} \frac{2 t}{1+t} d t\)
A. -6
B. 6
C. -3
D. 3
A. \(3[F(6)-F(3)]\)
B. \(F(6)-F(3)\)
C. \(3[F(2)-F(1)]\)
D. \(F(2)-F(1)\)
A. 4/3
B. 7/3
C. 8/3
D. 1
A. 3
B. 6
C. 4
D. 5
A. \(\frac{{25}}{4}\)
B. \(\frac{{25}}{2}\)
C. \(\frac{{23}}{4}\)
D. \(\frac{{23}}{2}\)
A. S=2+e
B. S=2-e
C. S=e−2
D. S=e−1
A. \( S = \left| {\mathop \smallint \limits_0^3 \left( {{x^2} - 3x + 2} \right)dx} \right|\)
B. \( S = \mathop \smallint \limits_1^2 \left| {{x^2} - 3x + 2} \right|dx\)
C. \( S = \mathop \smallint \limits_0^3 \left| {{x^2} - 3x + 2} \right|dx\)
D. \( S = \mathop \smallint \limits_1^2 \left| {{x^2} + x - 2} \right|dx\)
A. N(x;y;z)
B. N(x;y;0)
C. N(0;0;z)
D. N(0;0;1)
A. (3;17;−2)
B. (−3;−17;2)
C. (3;−2;5)
D. (3;5;−2)
A. M(1;2;0)
B. M(2;1;0)
C. M(2;0;1)
D. M(0;2;1)
A. -1
B. 1
C. 2
D. -2
A. -1
B. 1
C. 2
D. -2
A. \((P): x+y+z-3=0\)
B. \((P): x+y+2 z-1=0\)
C. \((P): x+y+z-6=0\)
D. \((P): x+y+2 z-6=0\)
A. \((P): 6 x-3 y+5 z=0\)
B. \((P): 2 x-y-3 z=0\)
C. \((P):-6 x+3 y+4 z=0\)
D. \((P): 2 x-y+3 z=0\)
A. \((Q): x-2 y+2 z+1=0\, và \,(Q):-x+2 y-2 z+11=0\)
B. \((Q):-x+2 y-2 z+11=0\)
C. \((Q): x-2 y+2 z+1=0\)
D. \((Q): x-2 y+2 z-11=0\)
A. 4 mặt phẳng.
B. Có vô số mặt phẳng.
C. 1 mặt phẳng.
D. 7 mặt phẳng.
A. 2
B. 1
C. -1
D. -2
A. \(d: \frac{x-1}{1}=\frac{2-y}{1}=\frac{z+1}{2}\)
B. \(d: \frac{x+1}{1}=\frac{y+2}{-1}=\frac{z-1}{2}\)
C. \(d: \frac{x-1}{1}=\frac{y-2}{1}=\frac{z+1}{2}\)
D. \(d: \frac{x-1}{1}=\frac{y-2}{-1}=\frac{z+1}{2}\)
A. \(\left\{\begin{array}{l}x=2 t \\ y=-t \\ z=-1-t\end{array}\right.\)
B. \(\left\{\begin{array}{l}x=4 t \\ y=-2 t \\ z=-1-2 t\end{array}\right.\)
C. \(\left\{\begin{array}{l}x=2 t \\ y=-t \\ z=1+t\end{array}\right.\)
D. \(\left\{\begin{array}{l}x=4 t \\ y=-2 t \\ z=1-2 t\end{array}\right.\)
A. \(d: \frac{x-2}{2}=\frac{y-1}{-1}=\frac{z-3}{3}\)
B. \(d: \frac{x+2}{2}=\frac{y-1}{-3}=\frac{z+3}{1}\)
C. \(d: \frac{x-2}{2}=\frac{y+3}{-1}=\frac{z-1}{3}\)
D. \(d: \frac{x-2}{2}=\frac{y+1}{-3}=\frac{z-3}{1}\)
A. \(\left\{\begin{array}{l}x=1+t \\ y=2-2 t \\ z=-2+3 t\end{array}\right.\)
B. \(\left\{\begin{array}{l}x=-1+t \\ y=-2-2 t \\ z=2+3 t\end{array}\right.\)
C. \(\left\{\begin{array}{l}x=1+t \\ y=2-2 t \\ z=-2\end{array}\right.\)
D. \(\left\{\begin{array}{l}x=-1+t \\ y=-2-2 t \\ z=2\end{array}\right.\)
A. \(\begin{array}{l} \left\{\begin{array}{l} x=-2 t \\ y=10 t ; t \in \mathbb{R} \\ z=4 t \end{array}\right. \end{array}\)
B. \(\left\{\begin{array}{l} x=t-1 \\ y=5 \quad ; t \in \mathbb{R} \\ z=2 \end{array}\right.\) và \(\left\{\begin{array}{l} x=-2 t \\ y=10 t ; t \in \mathbb{R} \\ z=4 t \end{array}\right.\)
C. \(\left\{\begin{array}{l} x=t-1 \\ y=5 \quad ; t \in \mathbb{R} \\ z=2 \end{array}\right.\)
D. \(\left\{\begin{array}{l} x=-m \\ y=5 m ; m \in \mathbb{R} \\ z=2 m \end{array}\right.\)
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. \(I\left( 1;-2;2 \right);\text{ }I\left( 5;2;10 \right)\)
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
B. 3
C. \(\sqrt{74}\)
D. 4
A. 42
B. 19
C. 38
D. 12
A. \(\sqrt2\)
B. 1
C. \(1\over2\)
D. \(\sqrt3\)
A. \(140\over 3\)
B. 140
C. 70
D. \(70\over 3\)
A. \(\sqrt{29}\over2\)
B. \(1\over\sqrt{29}\)
C. \(\sqrt{29}\)
D. \(14\over\sqrt{29}\)
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