Question 634055
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
Note: {{{a^(-n) = 1/a^n}}}
{{{(-.6)^(-3) = 1/(-.6)^3 = - 1/.216}}}
 -1/.216 = -4.<span style="text-decoration: overline">629</span>