0007.ptx

<exercise checkit-seed="0007" 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}
0 &amp; -1 &amp; -2 &amp; -2 \\
-3 &amp; 4 &amp; 7 &amp; -7 \\
-2 &amp; 1 &amp; -1 &amp; -4 \\
1 &amp; 0 &amp; 1 &amp; 4
\end{array}\right] </m>.</p>
  </statement>
  <answer>
    <me>M^{-1}= \left[\begin{array}{cccc}
-35 &amp; -6 &amp; -11 &amp; -39 \\
-35 &amp; -6 &amp; -10 &amp; -38 \\
11 &amp; 2 &amp; 3 &amp; 12 \\
6 &amp; 1 &amp; 2 &amp; 7
\end{array}\right] </me>
  </answer>
</exercise>