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 September 8th, 2013, 07:42 PM #1 Member   Joined: Nov 2012 Posts: 61 Thanks: 0 CIrcle the center of the circle obtained by reflecting the circle $x^{2} + y^{2}=m^{2} + m +1$ in the line y = mx+m is
 September 9th, 2013, 01:27 AM #2 Global Moderator   Joined: Dec 2006 Posts: 20,757 Thanks: 2138 You need the reflection of the origin in the given line. The answer is (-2m²/(m² + 1), 2m/(m² + 1)).

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