1.

vec(a)=hatj-hatk and vec( c )=hati-hatj-hatk. The vector vec(b) is such that vec(a) xx vec(b)+vec( c )=0 and vec(a)*vec(b)=3 then vec(b) = ………..

Answer»

`-hati+hatj-2hatk`
`2hati-hatj+2hatk`
`hati-hatj-2hatk`
`hati+hatj-2hatk`

ANSWER :A


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