Math Problem Statement
Solution
Let’s analyze the given polynomial function step by step.
Given Function:
(a) List each real zero and its multiplicity:
The zeros of a polynomial are the values of that make .
- From the factor , is a zero with multiplicity .
- From the factor , is a zero with multiplicity .
Zeros and their multiplicities:
- , multiplicity
- , multiplicity
(b) Determine whether the graph crosses or touches the x-axis at each x-intercept:
The behavior at each intercept is determined by the multiplicity:
- Multiplicity 2 (even): The graph touches the x-axis at but does not cross it.
- Multiplicity 3 (odd): The graph crosses the x-axis at .
Summary:
- At , the graph touches the x-axis.
- At , the graph crosses the x-axis.
(c) Determine the end behavior:
The end behavior of a polynomial is determined by the degree and the leading term.
-
Degree of the polynomial: (x - 2)^2(x + 9)^3
The degree is odd.
-
Leading coefficient: The product of the leading terms in and is positive:
-
End behavior for odd-degree polynomials with a positive leading coefficient:
- As , (falls to the left).
- As , (rises to the right).
Answer for end behavior: B. Falls left and rises right.
Final Answer Summary:
(a) Real zeros:
- , multiplicity 2
- , multiplicity 3
(b) Behavior at intercepts:
- Touches the x-axis at .
- Crosses the x-axis at .
(c) End behavior:
- Falls left and rises right (B).
Do you have further questions or would you like a detailed graph analysis? Here are 5 related questions:
- How can you confirm the behavior of a graph at a zero using calculus (e.g., derivatives)?
- Why does even multiplicity result in touching but odd multiplicity results in crossing the x-axis?
- How do you determine leading coefficients from factored forms?
- What changes in end behavior if the leading coefficient is negative?
- How would adding another factor (e.g., ) affect the end behavior?
Tip: Always verify graph behaviors by analyzing the polynomial's degree, leading coefficient, and multiplicities!
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Math Problem Analysis
Mathematical Concepts
Polynomial functions
Zeros of a polynomial
End behavior of polynomials
Formulas
Multiplicity: Behavior of the graph at each zero
Degree of polynomial: Sum of multiplicities
Leading term test for end behavior
Theorems
Behavior at zeros based on multiplicity
End behavior based on degree and leading coefficient
Suitable Grade Level
Grades 10-12
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