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<p>This lecture looks at matrix multiplication from five different points of view. We then learn how to find the inverse of a matrix using elimination, and why the Gauss-Jordan method works.</p>
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<h2 class="hd hd-2 unit-title">Lecture Summary and Reading</h2>
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<h3>Lecture Summary</h3>
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<li><span style="text-decoration: underline;"><a href="/assets/courseware/v1/8d7985fd5d8a95db644a907e2970b298/asset-v1:OCW+18.06SC+2T2019+type@asset+block/18.06_1.4_LecSum.pdf" target="[object Object]">Multiplication and Inverse Matrices (PDF)</a></span></li>
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<h3>Suggested Reading</h3>
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<li>Read Section 2.4 through 2.5 in the 4<sup>th</sup> or 5<sup>th</sup> edition.</li>
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<p>Work the problems on your own and check your answers when you're done.</p>
<p><a href="/assets/courseware/v1/00653c39ccaea59471150735856b6652/asset-v1:OCW+18.06SC+2T2019+type@asset+block/18.06_1.4_Problems.pdf" target="[object Object]"><span style="text-decoration: underline;">Exercises on multiplication and inverse matrices (PDF)</span></a></p>
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