1.

The reflection of the point a in the plane vecr.vecn=q is

Answer»

`veca + ((VECQ - veca .VECN))/(|vecn|)`
`veca + 2 (((vecq - veca.vecn))/(|vecn|^(2))) vecn`
`veca + (2 (vecq + veca.vecn))/(|vecn|) vecn`
`veca- (2 ( vecq - veca.vecn))/(|vecn|)`

ANSWER :B


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