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Find the slope of a line perpendiculat to the line y=1/2x+7

  • Math -

    Pretty easy. Use the fact that the product of the first derivatives of linear functions and their perpendiculars respectively are always -1.
    This is:
    m'=-1/(1/2)=-2
    Since we can choose an arbitrary function with the imposed properties, it suffices to take
    g(x)=-2*x
    q.e.d.

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