First Principles AI

Accedmychevron_right11thchevron_rightmathchevron_rightMatrices And Determinantschevron_rightExercise 4.2

Key facts

If $|A|\ne 0$ , then:

A^{-1}=\frac{1}{|A|}\operatorname{adj}(A)

and:

AA^{-1}=A^{-1}A=I