If P3×2, Q3×4 and R3×4 are matrices, then the product [Q(PT R)-1 QT – McqOptions

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1.	If P3×2, Q3×4 and R3×4 are matrices, then the product [Q(PT R)-1 QT] is
A.	a matrix of order (3 × 4)
B.	undefined matrix
C.	a scalar matrix
D.	matrix of order (3 × 3)
Answer» C. a scalar matrix

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