Mathematics

Mathematics

Problem

For any 3×33 \times 3 matrix MM, let ∣M∣|M| denote the determinant of MM. Let II be the 3×33 \times 3 identity matrix. Let EE and FF be two 3×33 \times 3 matrices such that (I−EF)(I - EF) is invertible. If G=(I−EF)−1G = (I - EF)^{-1}, then which of the following statements is/are TRUE? (A) ∣EF∣=∣I−FE∣|EF| = |I - FE| (B) (I−FE)⋅(I+FGE)=I(I - FE) \cdot (I + FGE) = I (C) EFG=GEFEFG = GEF (D) (I−FE)(I−FGE)=I(I - FE)(I - FGE) = I

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