1.

If veca = hati + hatj - hatk, vecb =- hati + 2 hatj + 2 hatk and vec c=- hati + 2 hatj - hatk, then a unit vector normal to the vectors veca + vecb and vecb - vecc is :

Answer»

`HATI`
`HATJ`
`HATK`
NONE of these.

ANSWER :A


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