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Distance of the point P( vec p) from th...

Distance of the point `P( vec p)` from the line ` vec r= vec a+lambda vec b` is a. `|( vec a- vec p)+((( vec p- vec a)dot vec b) vec b)/(| vec b|^2)|` b. `|( vec b- vec p)+((( vec p- vec a)dot vec b) vec b)/(| vec b|^2)|` c. `|( vec a- vec p)+((( vec p- vec b)dot vec b) vec b)/(| vec b|^2)|` d. none of these

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