यदि vecA = 2hati - hatj + 2hatk तथा vecB...

यदि `vecA = 2hati - hatj + 2hatk` तथा `vecB =-hati-hatj+ hatk` है, तो `vecA - vecB` का इकाई सदिश होगा :

A

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

B

`(3hati)/sqrt10`

C

`(hatk)/sqrt10`

D

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

लिखित उत्तर

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The correct Answer is:

A

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