Vector Algebra Question 7
Question: If $ \mathbf{a}=\mathbf{i}-2\mathbf{j} $ and $ \mathbf{b}=2\mathbf{i}+\lambda \mathbf{j} $ are parallel, then $ \lambda $ is
[RPET 1996]
Options:
A) 4
B) 2
C) ? 2
D) ? 4
Show Answer
Answer:
Correct Answer: D
Solution:
- $ \frac{1}{2}=\frac{-2}{\lambda }\Rightarrow \lambda =-4 $ .
BETA
