 the truncation error. That is, choosing the exact
solution <code>u</code> and compute the max norm of <code>A*u - f</code>. Change <code>h</code> and show the
order of the truncation error.</p>

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<h2 id="Step-3:-Boundary-Conditions">Step 3: Boundary Conditions<a class="anchor-link" href="#Step-3:-Boundary-