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April 15th, 2009, 05:43 AM  #1 
Newbie Joined: Apr 2009 Posts: 1 Thanks: 0  proving the reflective property of a hyperbola http://mathworld.wolfram.com/Hyperbola.html about 1/4 of the way down the page, how have they went from step (3) to (4)? 
April 15th, 2009, 09:09 AM  #2  
Newbie Joined: Apr 2009 Posts: 11 Thanks: 0  Re: proving the reflective property of a hyperbola Quote:
 

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