pan><span class="op">)</span><span class="op">)</span> <span class="op">{</span></span></span>
<span class="r-in"><span>  <span class="fu"><a href="def_sym.html">def_sym</a></span><span class="op">(</span><span class="va">b0</span>, <span class="va">b1</span>, <span class="va">x</span>, <span class="va">x0</span><span class="op">)</span></span></span>
<span class="r-in"><span>  <span class="va">f</span> <span class="op">&lt;-</span> <span class="va">b0</span> <span class="op">/</span> <span class="op">(</sp