A unit vector along the vector 4hati-3ha...

A unit vector along the vector `4hati-3hatk` is

A

`1/7(4hati-3hatk)`

B

`1/5(4hati-3hatk)`

C

`1/sqrt7(4hati-3hatk)`

D

`1/sqrt5(4hati-3hatk)`

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