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Homework Help: A differentiation question

  1. Oct 14, 2004 #1
    I need help for an easy question :

    For what value(s) ok K, line x+y=K is arthogonal to the curve y=x^2

  2. jcsd
  3. Oct 14, 2004 #2


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    Homework Helper

    Hint: Two lines are orthogonal if the product of their slopes = -1.
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