Vector Algebra Question 392
Question: If the vectors $ a\mathbf{i}+b\mathbf{j}+c\mathbf{k} $ and $ p\mathbf{i}+q\mathbf{j}+r\mathbf{k} $ are perpendicular, then
[RPET 1989]
Options:
A) $ (a+b+c),(p+q+r)=0 $
B) $ (a+b+c),(p+q+r)=1 $
C) $ ap+bq+cr=0 $
D) $ ap+bq+cr=1 $
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Answer:
Correct Answer: C
Solution:
- It is obvious.
BETA
