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The reflection of the point vec a i...

The reflection of the point ` vec a` in the plane ` vec rdot vec n=q` is a. ` vec a+(( vec q- vec adot vec n))/(| vec n|)` b. ` vec a+2((( vec q- vec adot vec n))/(| vec n|)) vec n` c. ` vec a+(2( vec q+ vec adot vec n))/(| vec n|^2) vec n` d. none of these

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