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Decide Whether or Not Matrix a and Matrix B Are

question 149

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Decide whether or not matrix A and matrix B are inverses.
- A=[2444] and B=[1/21/41/21/4]\mathrm { A } = \left[ \begin{array} { r r } - 2 & 4 \\4 & - 4\end{array} \right] \text { and } \mathrm { B } = \left[ \begin{array} { l l } 1 / 2 & 1 / 4 \\1 / 2 & 1 / 4\end{array} \right]


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