JEE Main 201912 Jan, Evening shiftMathematicsEasyThree Dimensional Geometry249× since 2002
Let S be the set of all real values of such that a plane passing through the points (–², 1, 1), (1, –², 1) and (1, 1, – ²) also passes through the point (–1, –1, 1). Then S is equal to :