Three Dimensional Geometry Question 69
Question: Direction ratios of the normal to the plane passing through the points (0, 1, 1), (1, 1, 2) and (-1, 2, - 2) are
Options:
A) (1, 1, 1)
B) (2, 1, -1)
C) (1, 2, -1)
D) (1, - 2, - 1)
Show Answer
Answer:
Correct Answer: D
Solution:
$ l,(1)+m(0)+n(2-1)=0\Rightarrow l+n=0 $ And $ l,(-2)+m(1)+n(-4)=0\Rightarrow ,2l-m+4n=0 $
$ \therefore ,l=-\frac{m}{2}=-,n $ . Hence direction ratios are $ (1,-2,-1) $ .
BETA
