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IF a = x hati + y hatj + z hatk the...

IF `a = x hati + y hatj + z hatk ` then `( a xx hati) . ( hati + hatj ) + ( a xx hatj ) . ( hatj + hatk ) + ( a xx hatk ) . ( hatk + hati ) =`

A

`x-y+z`

B

`x+y+z`

C

`x+y-z`

D

`-x +y+z`

Text Solution

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The correct Answer is:
B
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