Math Problem Statement
f(x) = x2(x – a)2(x – b)4(x – c)
f(x) = x3(x – a)3(x – b)(x – c)2
f(x) = x4(x – a)(x – b)3(x – c)3
f(x) = (x – a)2(x – b)(x – c)6
Solution
To determine which function could represent the graph, let’s analyze the key characteristics of the graph, especially the zeroes, multiplicities, and general behavior.
Observations from the Graph
- Roots: The graph crosses the x-axis at least three distinct points, indicating at least three distinct roots.
- Multiplicity of Roots: The graph shows some roots with an odd multiplicity (it crosses the x-axis) and some with an even multiplicity (it touches the x-axis without crossing it).
- Degree of Polynomial: The overall shape suggests a higher degree polynomial with positive leading behavior (as , ).
Analyzing Each Option
Let’s break down each given function to match these characteristics:
-
Option 1:
- Degree:
- Roots:
- The graph of a degree-9 polynomial would generally end with opposite signs as . However, this graph ends with both ends up, so this option may not fit.
-
Option 2:
- Degree:
- Roots:
- Similar to Option 1, this has a degree-9, but with a similar issue of sign behavior at both ends.
-
Option 3:
- Degree:
- Roots:
- Degree-11 would also show opposite end behavior, which doesn’t match.
-
Option 4:
- Degree:
- Roots: only, no .
- Matches an odd multiplicity for root
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Math Problem Analysis
Mathematical Concepts
Polynomial Functions
Roots and Multiplicity
End Behavior of Polynomials
Formulas
General form of a polynomial function
Theorems
Multiplicity Theorem for Polynomial Roots
Suitable Grade Level
Grades 11-12
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