Vector Algebra Question 33
Question: The centre of the sphere $ \alpha ,\mathbf{r}-2\mathbf{u}.\mathbf{r}=\beta ,(\alpha \ne 0) $ is
[AMU 1999]
Options:
A) $ -\mathbf{u}/\alpha $
B) $ \mathbf{u}/\alpha $
C) $ \alpha \mathbf{u}/\beta $
D) $ \frac{\alpha +\beta }{\alpha }\mathbf{u} $
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Answer:
Correct Answer: D
Solution:
- It is obvious.
BETA
