Write the Word or Phrase That Best Completes Each Statement $$A = \left[ \begin{array} { l l } a & b \\c & d\end{array} \right]$$

Short Answer

Write the word or phrase that best completes each statement or answers the question.
Provide the missing information.
-Let $$A = \left[ \begin{array} { l l } a & b \\c & d\end{array} \right]$$ be an invertible matrix. Then a formula for the inverse A-1 is given by
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