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The projection of point P( vec p) on the...

The projection of point `P( vec p)` on the plane ` vec rdot vec n=qi s( vec s)` , then a. ` vec s=((q- vec pdot vec n) vec n)/(| vec n|^2)` b. ` vec s=p+((q- vec pdot vec n) vec n)/(| vec n|^2)` c. ` vec s=p-(( vec pdot vec n) vec n)/(| vec n|^2)` d. ` vec s=p-((q- vec pdot vec n) vec n)/(| vec n|^2)`

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