Math Problem Statement
A polynomial p is graphed. What could be the equation of p? Options are given with different polynomial expressions.
Solution
To solve this, let's analyze the graph of the polynomial :
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Roots of the Polynomial:
- The graph touches the x-axis at and bounces off, indicating that is a factor with even multiplicity.
- The graph crosses the x-axis at , indicating that is a factor with odd multiplicity.
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Behavior near Roots:
- At , since the graph touches the axis and turns around, the multiplicity of must be even.
- At , since the graph crosses the axis, the multiplicity of must be odd.
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Possible Degree:
- From the turning points and general shape, the total degree of the polynomial seems to be 5 (sum of the multiplicities of the factors).
Now let's evaluate the given choices:
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Option A:
- The factor gives a root at with odd multiplicity (3), which is consistent.
- The factor gives a root at with even multiplicity (2), which is consistent.
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Option B:
- Both factors have even multiplicity. Since the root at requires an odd multiplicity, this is incorrect.
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Option C:
- Both factors have odd multiplicity. The root at requires an even multiplicity, so this is incorrect.
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Option D:
- The factor gives an even multiplicity for the root at , which is incorrect.
Thus, the correct answer is Option A.
Would you like further details or explanations?
Here are 5 follow-up questions to consider:
- How do multiplicities of factors affect the shape of a polynomial graph?
- What happens when the multiplicity of a root is odd vs. even?
- How do we determine the degree of a polynomial from its graph?
- Why do turning points indicate changes in the sign of the derivative?
- What is the role of leading coefficients in determining the end behavior of polynomials?
Tip: When analyzing polynomial graphs, always check how the curve behaves at the x-intercepts—whether it crosses or touches the axis—this will tell you the root multiplicity!
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Math Problem Analysis
Mathematical Concepts
Polynomial Functions
Roots and Multiplicities
Graph Analysis
Formulas
Factoring of polynomials
Multiplicity of roots
Theorems
Multiplicity and Graph Behavior Theorem
Suitable Grade Level
Grades 10-12