0001.ptx

<exercise checkit-seed="0001" checkit-slug="M4" checkit-title="Finding a matrix inverse">
  <statement>
    <p>Show how to find the inverse of the matrix <m>M= \left[\begin{array}{cccc}
3 &amp; 2 &amp; -4 &amp; 2 \\
-2 &amp; -1 &amp; 1 &amp; -4 \\
-1 &amp; -1 &amp; 4 &amp; 3 \\
-2 &amp; -1 &amp; 2 &amp; -2
\end{array}\right] </m>.</p>
  </statement>
  <answer>
    <me>M^{-1}= \left[\begin{array}{cccc}
1 &amp; 4 &amp; 2 &amp; -4 \\
4 &amp; 2 &amp; 2 &amp; 3 \\
2 &amp; 3 &amp; 2 &amp; -1 \\
-1 &amp; -2 &amp; -1 &amp; 1
\end{array}\right] </me>
  </answer>
</exercise>