alleryIf A·B = I (identity) and A·C = I, then B equals:
AC (the inverse is unique)
BC⁻¹
CI
DCannot determine
Answer & Solution
Correct answer: A. C (the inverse is unique)
Matrix inverse is unique.
If A has any inverse, it has only one.
We have **So B = C.
So **So B = A⁻¹.**.
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