For any matrix

MATHEMATICS · Multi correct · CBSE · Mathematics · Matrices · Matrices

Problem

For any 3×33\times3 matrix MM, let ∣M∣|M| denote the determinant of MM. Let II be the 3×33\times3 identity matrix. Let EE and FF be two 3×33\times3 matrices such that I−EFI-EF is invertible. If G=(I−EF)−1G=(I-EF)^{-1}, which of the following statements are true? (A) ∣EF∣=∣I−FE∣|EF|=|I-FE| (B) (I−FE)(I+FGE)=I(I-FE)(I+FGE)=I (C) EFG=GEFEFG=GEF (D) (I−FE)(I−FGE)=I(I-FE)(I-FGE)=I

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