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TMC14
Using focus and directrix
TMC14
Author:
John Golden
Materials for, referenced in or created at Twitter Math Camp 2014. Cf. Audrey McLaren,
http://www.geogebratube.org/user/profile/id/1012
John Golden,
http://www.geogebratube.org/user/profile/id/553
Using focus and directrix
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Using focus and directrix
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