Math Problem Statement

Find the equation of a hyperbola satisfying the given conditions. Asymptotes y=1/3x, y=-1/3x; one vertex (6,0)

Solution

To find the equation of the hyperbola, we follow these steps:

Step 1: General Equation and Orientation

The asymptotes y=±13xy = \pm \frac{1}{3}x suggest the hyperbola has a center at the origin (h=0,k=0h = 0, k = 0), and it is oriented horizontally since one vertex is given as (6,0)(6, 0). For a horizontal hyperbola, the equation is:

x2a2y2b2=1\frac{x^2}{a^2} - \frac{y^2}{b^2} = 1

Step 2: Relation Between aa, bb, and the Slope of Asymptotes

The slopes of the asymptotes are ±ba=±13\pm \frac{b}{a} = \pm \frac{1}{3}. Therefore:

ba=13    b=a3.\frac{b}{a} = \frac{1}{3} \implies b = \frac{a}{3}.

Step 3: Use Vertex to Determine aa

The distance from the center to the vertex is equal to aa. Since one vertex is at (6,0)(6, 0), we have:

a=6.a = 6.

Step 4: Find b2b^2

Using b=a3b = \frac{a}{3}, we calculate:

b=63=2    b2=4.b = \frac{6}{3} = 2 \implies b^2 = 4.

Step 5: Write the Equation

Substituting a2=36a^2 = 36 and b2=4b^2 = 4 into the equation of the hyperbola, we get:

x236y24=1.\frac{x^2}{36} - \frac{y^2}{4} = 1.

Final Answer:

The equation of the hyperbola is:

x236y24=1.\boxed{\frac{x^2}{36} - \frac{y^2}{4} = 1.}


Would you like a detailed explanation of the derivation, or do you have any questions?

Related Questions:

  1. How do you derive the equation of hyperbolas with vertical orientation?
  2. What are the key features (foci, asymptotes, etc.) of this hyperbola?
  3. How do the slopes of the asymptotes affect the orientation of a hyperbola?
  4. How can we find the foci of this hyperbola?
  5. How do you generalize the equation of a hyperbola with a center not at the origin?

Tip:

The distance between the foci of a hyperbola can be calculated using 2c2c, where c=a2+b2c = \sqrt{a^2 + b^2}. This is useful for fully characterizing the hyperbola.

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Math Problem Analysis

Mathematical Concepts

Conic Sections
Hyperbolas
Equations of Hyperbolas

Formulas

Equation of a horizontal hyperbola: (x^2/a^2) - (y^2/b^2) = 1
Slope of asymptotes for a hyperbola: ±b/a
Distance from center to vertex: a

Theorems

Properties of hyperbolas with horizontal and vertical orientations

Suitable Grade Level

Grades 10-12