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If the centroid of the tetrahedron OABC...

If the centroid of the tetrahedron OABC where A,B,C are the points (a,2,3),(1,b,2) and (2,1,c) be (1,2,3) and the point (a,b,c) is at distance `5sqrt(lambda)` from origin then `lambda^(2)` must be equals to

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