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<h2 class="hd hd-2 unit-title">2.4 Session Overview</h2>
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<p>By approaching what we've learned from new directions, the questions in this exam review session test the depth of your understanding. Notice the short questions (with answers) at the end. This unit reached the key ideas of subspaces — a higher level of linear algebra. Please review the list of topics on the left.</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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<h3>Suggested Reading</h3>
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<li>Review Chapters 1, 2, and 3, plus Section 8.2 in the 4<sup>th</sup> edition or Chapters 1, 2, and 3, plus Section 10.1 in the 5<sup>th </sup>edition.</li>
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