Chapter 10: Problem 8
Name the conic corresponding to the given equation. \(x^{2}-4 y^{2}=4\)
Short Answer
Expert verified
The conic is a hyperbola.
Step by step solution
01
Identify the terms
Examine the given equation \(x^{2} - 4y^{2} = 4\). The terms \(x^2\) and \(-4y^2\) indicate the square terms are quadratic and have different signs.
02
Compare with standard form
The standard form for a conic section of a hyperbola is \(Ax^2 + By^2 = C\), where \(A\) and \(B\) have opposite signs. Our equation \(x^{2} - 4y^{2} = 4\) matches this pattern with \(A = 1\) and \(B = -4\), confirming opposite signs.
03
Conclusion on the type of conic
Since the square terms \(x^2\) and \(-4y^2\) have opposite signs, the conic section is a hyperbola.
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Hyperbola
A hyperbola is a fascinating type of conic section. Created by the intersection of a double cone, it has a unique shape that resembles two open curves, known as branches. A hyperbola is defined mathematically where the difference of distances to two fixed points, called foci, remains constant. Hyperbolas have several important properties:
- Two parts or branches that open either horizontally or vertically.
- A center point that lies midway between the foci.
- Asymptotes that pass through the center and guide the shape of the hyperbola.
- Both branches approach these asymptotes but never actually touch them.
Quadratic Equations
Quadratic equations involve terms raised to the second power, which you see in forms like \(ax^2 + bx + c = 0\). In our problem, the equation \(x^2 - 4y^2 = 4\) features quadratic terms, recognizing them as expressions with a degree of two. A quadratic equation can include single-variable terms or a combination of different variables, each raised to a power of two, as seen in our example with both \(x^2\) and \(y^2\). These expressions can create various conic section shapes, such as circles, ellipses, parabolas, and hyperbolas, depending on the specific configuration of terms. Here, the equation creates a hyperbola because the quadratic terms \(x^2\) and \(-4y^2\) reveal different signs, forming the hyperbola's characteristic shape.
Standard Form of Hyperbola
The standard form of a hyperbola equation varies based on how it is oriented in the plane:
- Horizontally oriented: \(\frac{x^2}{a^2} - \frac{y^2}{b^2} = 1\)
- Vertically oriented: \(\frac{y^2}{b^2} - \frac{x^2}{a^2} = 1\)
Mathematical Problem Solving
Mathematical problem solving is a crucial skill that involves breaking down complex problems into manageable parts. To tackle equations involving conic sections like hyperbolas, a step-by-step approach is usually best.
- Identify the components: Recognize and analyze the equation’s terms. Here, noticing the square terms \(x^2\) and \(-4y^2\) is key.
- Classify the equation: Compare it with known conic section forms. Finding that \(x^2 - 4y^2\) fits the hyperbola's form helped us deduce the shape.
- Simplify and transform: Convert or rework the equation into its standard form, such as converting \(x^2 - 4y^2 = 4\) to its equivalent hyperbola form \(\frac{x^2}{4} - \frac{y^2}{1} = 1\).
- Draw conclusions: Use the simplified form to extract more insights, such as identifying axis orientations, lengths, and asymptotes.