Let a and B be matrices of third order and | a | = 3 | B | = 2 | A-1 + B | = 2 find | a + B-1 |, where A-1 is the inverse matrix

Let a and B be matrices of third order and | a | = 3 | B | = 2 | A-1 + B | = 2 find | a + B-1 |, where A-1 is the inverse matrix


|A||B+A^-1|=|AB+E|=|A+B^-1||B|