A) \[adj\,(A)\,=\,\left| A \right|{{A}^{-1}}\]
B) \[\det \,({{A}^{-1}})\,=\,{{[\det A]}^{-1}}\]
C) \[{{(AB)}^{-1}}={{B}^{-1}}{{A}^{-1}}\]
D) \[{{(A+B)}^{-1}}={{B}^{-1}}+{{A}^{-1}}\]
Correct Answer: D
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