Calculus

Find an equation of the tangent line to the curve f(x)=-1/x+2 at the points (2, -1/4).

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  1. is it -1/(x+2) or (-1/x) + 2
    In either case, take the derivative, put in (x=2), and that is the slope.

    Y=mx+b
    now at the point in question, you have, x, m, y solve for b.

  2. f'(x) = -1/x^2
    which at (2, -1/4) is -1/4

    so y + 1/4 = -1/4(x-2)
    times 4

    4y + 1 = -(x-2)

    x+4y = 1

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    posted by Reiny
  3. Bobpursley, It is -(1)/(x+2)

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