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  1. 10-20-2013, 07:04 PM Top | #1
    Jul 2013
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    (x^2/a^2+y^2/b^2=1) (x1,y1) xx1/a^2+yy1/b^2=1 a,b R


  2. The Following 2 Users Say Thank You to For This Useful Post:

     (10-20-2013),  (10-21-2013)

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