MathematicsMedium244×since 2002Q4580Let A = {X = (x, y, z)^T: PX = 0 and x² + y² + z² = 1} where P = \left[ {\matrix{ 1 & 2 & 1 \cr { - 2} & 3 & { - 4} \cr 1 & 9 & { - 1} \cr } } \right], then the set A :Ais an empty set.Bcontains more than two elements.Ccontains exactly two elements.Dis a singleton.Check answerSkip