Which of the following is a true statement?
?

A. If ?A and ?C are matrices and , then .
B. Given , if , then M has an inverse.
C. If ?A, X, and ?C are matrices, and , then .
D. If ?A and ?C are matrices and , then  and if ?A, X, and ?C are matrices, and , then  is true.
E. None of these statements is true.

Answer: A

Mathematics

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