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Given : vecA = 2hati - hatj + 2hatk and ...

Given : `vecA = 2hati - hatj + 2hatk` and `vecB = -hati - hatj + hatk`. The unit vector of `vecA - vecB` is

A

`(3hati + hatk)/(sqrt10)`

B

`(3hati)/(sqrt10)`

C

`(3hatk)/(sqrt10)`

D

`(3hati - hatk)/(sqrt10)`

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The correct Answer is:
A
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