Trắc nghiệm Phương trình mặt phẳng có đáp án (Phần 1)

A. z = 0

B. x+y+z = 0

C. y = 0

D. x = 0

A. z = 0

B. x+y+z = 0

C. y = 0

D. x = 0

A. $\stackrel{\to }{n}=k.\stackrel{\to }{n\text{'}}$ và $d=k.d\text{'}$

B. $\frac{a}{a\text{'}}=\frac{b}{b\text{'}}=\frac{c}{c\text{'}}=\frac{d}{d\text{'}}\left(a\text{'}b\text{'}c\text{'}d\text{'}\ne 0\right)$

C. $\frac{a}{a\text{'}}=\frac{b}{b\text{'}}=\frac{c}{c\text{'}}=\frac{d\text{'}}{d}$

D. $a=ka\text{'};b=kb\text{'};c=kc\text{'};d=kd\text{'}\left(k\ne 0\right)$

A. $4x-5y+4=0$

B. $4x-5y-4=0$

C. $4x-5z+4=0$

D. $4x-5z-4=0$

A. $\left(a;b;c\right)$

B. $\left(a;-b;-c\right)$

C. $\left(-a;-b;-c\right)$

D. $\left(a;-b;-c;-d\right)$

A. $-\stackrel{\to }{a}$ hoặc $\stackrel{\to }{b}$

B. $\left(\stackrel{\to }{a},\stackrel{\to }{b}\right)$

C. $\stackrel{\to }{a}-\stackrel{\to }{b}$

D. $\stackrel{\to }{a}+\stackrel{\to }{b}$

A. $\stackrel{\to }{n}=\left(1;-1;3\right)$

B. $\stackrel{\to }{n}=\left(2;-1;3\right)$

C. $\stackrel{\to }{n}=\left(2;1;3\right)$

D. $\stackrel{\to }{n}=\left(2;3;-2\right)$

A. $2x+4y+z=0$

B. $x+2y-z-3=0$

C. $x+y+z+1=0$

D. $x+y+z-1=0$

A. $-x+y=0$

B. $3x-2y-z+3=0$

C. $x+y+z-2=0$

D. $3x-2y-z-3=0$

A. (P) và (Q) vuông góc với nhau

B. (P) và (Q) trùng nhau

C. (P) và (Q) cắt nhau

D. (P) và (Q) song song với nhau

A. 5

B. $\frac{5\sqrt{11}}{11}$

C. $\frac{5}{11}$

D. $-\frac{5}{\sqrt{11}}$

A. $\alpha =\beta$

B. $\alpha =180°-\beta$

C. $\sin \alpha =\sin \beta$

D. $\cos \alpha =\cos \beta$

A. $\cos \left(\stackrel{\to }{a}.\stackrel{\to }{b}\right)=\frac{1}{6}$

B. $\cos \left(\stackrel{\to }{a}.\stackrel{\to }{b}\right)=\frac{5}{36}$

C. $\cos \left(\stackrel{\to }{a}.\stackrel{\to }{b}\right)=\frac{5}{6}$

D. $\cos \left(\stackrel{\to }{a}.\stackrel{\to }{b}\right)=\frac{1}{36}$

A. $Q\left(2;-1;5\right)$

B. $P\left(0;0;-5\right)$

C. $M\left(1;1;6\right)$

D. $N\left(-5;0;0\right)$

A. $Q\left(1;-2;2\right)$

B. $N\left(1;-1;-1\right)$

C. $P\left(2;-1;-1\right)$

D. $M\left(1;1;-1\right)$

A. $V\left(0;-2;1\right)$

B. $Q\left(2;-3;4\right)$

C. $T\left(1;-1;1\right)$

D. $I\left(5;-7;6\right)$

A. $\stackrel{\to }{a}=\left(3;-3;0\right)$

B. $\stackrel{\to }{a}=\left(1;-2;3\right)$

C. $\stackrel{\to }{a}=\left(-1;1;0\right)$

D. $\stackrel{\to }{a}=\left(1;-1;0\right)$

A. $x+2y+3z-9=0$

B. $x+2y+3z-13=0$

C. $x+2y+3z+5=0$

D. $x+2y+3z+13=0$

A. $8x+8y-12z-25=0$

B. $2x+2y-3z-4=0$

C. $2x+2y-3z-6=0$

D. $x+y-\frac{3}{2}z-1=0$

A. $4x-y+z+7=0$

B. $4x-y+z+1=0$

C. $4x-y-z+7=0$

D. $4x-y-z+1=0$