1.

Consider the line L : (x-1)/(2) = (y)/(1) = (z+1)/(-2) and a point A (1,1,1). Let P be the foot of the perpendicular from A on L and Q be the image of the point A in the line L, 'O' being the origin. The distance of the origin from the point Q is

Answer»

`sqrt3`
`sqrt ((17)/(6))`
`sqrt ((17)/(3))`
`(1)/(sqrt3)`

Answer :C


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