The Determinant of the Inverse of a Matrix In Exercises 2932, find A1 . Begin by finding
Chapter 3, Problem 29(choose chapter or problem)
In Exercises 29-32, find \(\left|A^{-1}\right|\). Begin by finding \(A^{-1}\), and then evaluate its determinant. Verify your result by finding |A| and then applying the formula from Theorem 3.8, \(\left|A^{-1}\right|=\frac{1}{|A|}\).
\(A=\left[\begin{array}{rr}-2 & 4 \\ 1 & 1\end{array}\right]\)
Text Transcription:
|A^-1|
|A^-1|=frac 1 |A|
A=[-2 & 4 \\ 1 & 1]
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