Math Problem Statement
For the given rational function
f left parenthesis x right parenthesis equals StartFraction 2 x squared Over x squared plus 3 x minus 10 EndFractionf(x)=2x2x2+3x−10,
find the following.
Solution
Let's analyze the given rational function:
We'll determine the following properties:
1. Domain of the function:
The domain of a rational function includes all real numbers except where the denominator is equal to zero.
Set the denominator equal to zero and solve for :
This quadratic equation can be solved using the quadratic formula:
where , , and .
This simplifies to:
So, the domain is all real numbers except and :
2. Vertical asymptote:
Vertical asymptotes occur where the denominator equals zero and the numerator does not equal zero at those points.
Since the denominator equals zero at and , and the numerator does not equal zero at these points, there are vertical asymptotes at:
3. Horizontal asymptote:
To find the horizontal asymptote, compare the degrees of the numerator and the denominator:
- Both the numerator and the denominator have degree 2.
- The horizontal asymptote is given by the ratio of the leading coefficients of the numerator and denominator.
The leading coefficient of the numerator is , and the leading coefficient of the denominator is . Thus, the horizontal asymptote is:
4. X-intercept:
The x-intercept(s) occur where the numerator equals zero. Set the numerator equal to zero and solve for :
So, the x-intercept is at:
5. Y-intercept:
The y-intercept occurs where . Substitute into the function:
So, the y-intercept is also at:
Summary:
- Domain:
- Vertical asymptotes: and
- Horizontal asymptote:
- X-intercept:
- Y-intercept:
Would you like any additional details or have any questions?
Here are five related questions:
- How does the presence of multiple vertical asymptotes affect the graph of the function?
- What would happen to the horizontal asymptote if the degrees of the numerator and denominator were different?
- Can a rational function have a slant asymptote if the numerator and denominator have the same degree?
- How does the position of the x-intercept relate to the function's symmetry?
- What can be inferred about the function if the numerator is a higher degree polynomial than the denominator?
Tip: When solving for the vertical asymptotes, always double-check that the numerator does not also equal zero at those points, which would indicate a hole in the graph instead.
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Math Problem Analysis
Mathematical Concepts
Rational functions
Quadratic equations
Asymptotes
Polynomial functions
Formulas
Quadratic formula
Theorems
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Suitable Grade Level
Grades 11-12
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