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Math Help - Find equation of tangent line to the function at given point.

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    Find equation of tangent line to the function at given point.

    Find equation of tangent line to the function at given point.

    g(x) = 1/rad(x) ; (1,1)
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    Quote Originally Posted by rod789 View Post
    Find equation of tangent line to the function at given point.

    g(x) = 1/rad(x) ; (1,1)
    *sigh* I assume rad(x) means \sqrt{x}.

    Use the standard model y - y1 = m(x - x1).

    Substitute (1, 1) for (x1, y1) and m = g'(1).

    Note: \frac{1}{\sqrt{x}} = \frac{1}{x^{1/2}} = x^{-1/2}.
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