<PRE><B>Question 43446</B>
1/x-1/b divided by 1/xb+1/2

1/x-1/b
___________

1/xb+1/2

  (b-x)/xb
=------------------
   (2+xb)/2xb
  

  2(b-x)
=---------------------
  2+xb</PRE>