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Consider the two vectors veca = 3hati + ...

Consider the two vectors `veca = 3hati + 2hatj + 4hatk` and `hatb = hati - 3hatj + hatk`
The unit vector perpendicular to both `veca and vecb` are :

A

`(14hati + hatj - 12hatk)/(sqrt(308))`

B

`(14hati - hatj + 11hatk)/(sqrt(318))`

C

`(14hati + hatj - 11 hatk)/(sqrt(318))`

D

`(14hati + hatj + 11hatk)/(sqrt(318))`

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