Three Dimensional Geometry Question 74
Question: If the co-ordinates of the points P and Q be (1, ?2, 1) and (2, 3, 4) and O be the origin, then
Options:
A) $ OP=OQ $
B) $ OP,\bot ,OQ $
C) $ OP||OQ $
D) None of these
Show Answer
Answer:
Correct Answer: B
Solution:
$ a_1a_2+b_1b_2+c_1c_2=0, $ so $ OP\bot ,OQ $ .
BETA
