1.

Which of the following is known as the reversal rule?

A. (AB)<sup>-1</sup> = B<sup>-1</sup>A<sup>-1</sup>
B. (AB)<sup>-1</sup> = A<sup>-1</sup> B<sup>-1</sup>
C. (BA)<sup>-1</sup> = B<sup>-1</sup> A<sup>-1</sup>
D. (BA)<sup>-1</sup> = B<sup>-1</sup> A
Answer» B. (AB)<sup>-1</sup> = A<sup>-1</sup> B<sup>-1</sup>


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