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Vertical Tangent


A function f(x) has a vertical tangent line at x_0 if f is continuous at x_0 and

 lim_(x->x_0)f^'(x)=+/-infty.

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Cite this as:

Weisstein, Eric W. "Vertical Tangent." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/VerticalTangent.html

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