In problem use Theorem II.3 to find A -1 for the given matrix or show that no

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In problem use Theorem II.3 to find A-1 for the given matrix or show that no inverse exists.

4 2 3 A = 1 -1 -2 0/


Theorem II.3

If an n × n matrix A can be transformed into the n × n identity I by a sequence of elementary row operations, then A is nonsingular. The same sequence of operations that transforms A into the identity I will also transform I into A-1.

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