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The plane P1:4x+7y+4z+81=0 is rotated through a right angle about its line of intersection with the plane P2:5x+3y+10z=25. If the plane in its new position be denoted by P and the distance of plane P from the origin is d units, then the value of [d/2], where [.] represents the greatest integer function, is

Answer» The plane P1:4x+7y+4z+81=0 is rotated through a right angle about its line of intersection with the plane P2:5x+3y+10z=25. If the plane in its new position be denoted by P and the distance of plane P from the origin is d units, then the value of [d/2], where [.] represents the greatest integer function, is


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