Let A, B, C, D be n × n matrices, each with non-­zero determinant. If ABCD = 1, then B^-1 is
A. D^-1C^-1A^-1
B. CDA
C. ADC
D. Does not necessarily exist
Answer:C
Let A, B, C, D be n × n matrices, each with non-­zero determinant. If ABCD = 1, then B^-1 is
A. D^-1C^-1A^-1 B. CDA C. ADC D. Does not necessarily exist