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Asymptotes

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College Algebra

Definition

Asymptotes are lines that a curve approaches but never touches or intersects. They provide insight into the behavior of the graph at extreme values.

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5 Must Know Facts For Your Next Test

  1. Asymptotes can be vertical, horizontal, or oblique.
  2. For hyperbolas, asymptotes intersect at the center and define the slope of the branches.
  3. The equations of asymptotes for a hyperbola centered at $(h, k)$ with horizontal transverse axis are $y = k \pm \frac{b}{a}(x - h)$. For a vertical transverse axis, they are $y = k \pm \frac{a}{b}(x - h)$.
  4. Asymptotes help to sketch hyperbolas accurately by providing guidelines for their branches.
  5. Asymptotic behavior describes how functions behave as inputs approach infinity or specific values.

Review Questions

  • What is the role of asymptotes in graphing a hyperbola?
  • How do you determine the equations of asymptotes for a given hyperbola?
  • Why do hyperbolas never actually touch their asymptotes?
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