bb{R} = \{-1,0,1, \sqrt{2}, e,\pi, \;  4.94\ldots, \; \ldots \, \} \)</span>
</li>
<li>The complex numbers: <span class="inline_math">\( \mathbb{C} = \{ -1, 0, 1, i,  1+i, 2+3i,  \ldots \, \} \)</span>
</li></ul>
<p>These categories of numbers should be somewhat familiar to you.<span class="intersentencespace"></span> Think of them as neat classification labels for everything that you would normally call a number.<span class="intersentencespace"></span> Each group in the above list is a <em>set</em>.<span c