1.

If veca. hati+veca. (2hati+hatj)=veca. (hati+hatj+3hatk)=1 then veca is equal to

Answer»

`hati-hatk`
`(3hati+3hatj+hatk)//3`
`(hati+hatj+hatk)//3`
`(3hati-3hatj+hatk)//3`

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