Vector Algebra Question 139
Question: If the vectors $ 3,\mathbf{i}+2,\mathbf{j}-\mathbf{k} $ and $ 6,\mathbf{i}-4x\mathbf{j}+y\mathbf{k} $ are parallel, then the value of x and y will be
[RPET 1985, 86]
Options:
A) 1, ? 2
B) 1, ? 2
C) 1, 2
D) 1, 2
Show Answer
Answer:
Correct Answer: A
Solution:
- Obviously, $ \frac{3}{6}=\frac{2}{-4x}=-\frac{1}{y}\Rightarrow x=-1 $ and $ y=-2. $
BETA
