Matrix Determinants & Inverses

2 x 2 Matrices

Given $A=\left[\begin{array}{cc}2&3\\-4&1\end{array}\right]$ compute its determinant and inverse (A^-1).
Given $B=\left[\begin{array}{cc}3&1\\2&-5\end{array}\right]$ compute its determinant and inverse (B^-1).

3 x 3 Matrices

Given $A=\left[\begin{array}{ccc}2&0&5\\0&3&-4\\0&0&1\end{array}\right]$ compute its determinant and inverse (A^-1).
Given $B=\left[\begin{array}{ccc}0.5&0&-6\\0&2&3\\0&0&1\end{array}\right]$ compute its determinant and inverse (B^-1).

4 x 4 Matrices

Given $A=\left[\begin{array}{cccc}4&0&0&-2\\0&-3&0&3\\0&0&1&6\\0&0&0&1\end{array}\right]$ compute its determinant and inverse (A^-1).

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