da como
</p><pre class="example">                     n
                   ====
               1   \          _ 2
              ---   &gt;    (x - x)
              n-1  /       i
                   ====
                   i = 1
</pre>
<p>Exemplo:
</p>
<pre class="example">(%i1) load (descriptive)$
(%i2) load (numericalio)$
(%i3) s1 : read_list (file_search (&quot;pidigits.data&quot;))$
(%i4) var1 (s1), numer;
(%o4)                    8.5110101010101
(%i5) s2 : read_matrix (file_search (&quot;wind.data&quot;