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Homework Help: Simple differentiation problem

  1. Nov 17, 2015 #1
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    Last edited: Nov 17, 2015
  2. jcsd
  3. Nov 17, 2015 #2

    Ray Vickson

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    You have equated the x-values, but not the y-values; sharing a point means having the same x and y both.
     
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