Vector Algebra Question 152
Question: If $ \mathbf{p}=7\mathbf{i}-2\mathbf{j}+3\mathbf{k} $ and $ \mathbf{q}=3\mathbf{i}+\mathbf{j}+5\mathbf{k}, $ then the magnitude of $ \mathbf{p}-2\mathbf{q} $ is
[MP PET 1987]
Options:
A) $ \sqrt{29} $
B) 4
C) $ \sqrt{62}-2\sqrt{35} $
D) $ \sqrt{66} $
Show Answer
Answer:
Correct Answer: D
Solution:
- $ \mathbf{p}-2\mathbf{q}=\mathbf{i}-4\mathbf{j}-7\mathbf{k} $
BETA
