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June 16th, 2015, 06:31 PM  #1 
Senior Member Joined: Jan 2015 From: USA Posts: 107 Thanks: 2  how do I solve this impossible thing?
Hi, can someone help me with this problem? Thanx a lot

June 16th, 2015, 07:19 PM  #2 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,671 Thanks: 2651 Math Focus: Mainly analysis and algebra 
I would start by trying to find the equation of the tangent at a point $Q(q,q^2)$. Then, find $q$ such that the line passes through $P(p,p^2)$ where $p \ne q$.


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