/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 70 Graph the family of polynomials ... [FREE SOLUTION] | 91Ó°ÊÓ

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Graph the family of polynomials in the same viewing rectangle, using the given values of \(c .\) Explain how changing the value of \(c\) affects the graph. $$P(x)=x^{c} ; \quad c=1,3,5,7$$

Short Answer

Expert verified
As \(c\) increases, the graph becomes flatter near the origin and steeper farther away.

Step by step solution

01

Understand the Polynomial Function

The polynomial function given is \(P(x) = x^c\), where \(c\) is an exponent. For different values of \(c\), the function will behave differently. Starting with the algebraic form for each specified \(c\), we can explore how the graph changes.
02

Calculate the Polynomial for Each c Value

Let’s determine the polynomial expressions for each value of \(c\):- For \(c=1\), \(P(x) = x\), which is a linear function and represents a straight line.- For \(c=3\), \(P(x) = x^3\), a cubic polynomial which will graph as an odd-degree curve.- For \(c=5\), \(P(x) = x^5\), a quintic polynomial with a similar shape as \(x^3\) but more steep.- For \(c=7\), \(P(x) = x^7\), which further steepens the curve seen in \(x^5\).
03

Graph the Functions

Plot each of the functions \(P(x) = x\), \(P(x) = x^3\), \(P(x) = x^5\), and \(P(x) = x^7\) in the same graphing area. Each graph is symmetric about the origin due to being odd functions. Notice how as \(c\) increases, the curve becomes steeper and the slope near the origin is flatter.
04

Analyze the Effect of Changing c

Changing the value of \(c\) affects the steepness of the graph. As \(c\) increases, the graph near the origin becomes flatter while becoming steeper farther from the origin. High-degree polynomials exhibit extreme slopes as \(x\) moves away from zero. The graphs' general shape remains the same but stretches vertically.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Graphing Polynomials
Graphing polynomials involves plotting their function equations on a coordinate plane. By visualizing these equations as graphs, we can better understand their behavior and characteristics.
For any polynomial function like \( P(x) = x^c \), graphing helps us see the changes in shape and direction as the exponent \( c \) varies.
Each graph provides insights into the function's intercepts and curvature. By graphing polynomials such as \( x^1 \), \( x^3 \), \( x^5 \), and \( x^7 \) on the same viewing rectangle, we compare and analyze the differences in their shapes due to exponent changes.
This practice is essential in understanding how values of \( c \) affect the steepness and stretch of the curves. Observing the symmetry about the origin for these odd-degree polynomials also highlights key properties and behaviors specific to their degree.
Exponents
Exponents signal how many times a number, or base, like \( x \), is multiplied by itself. They play a crucial role in shaping the function's graph and determining its basic properties.
A low exponent such as 1 results in linear growth, forming a straight line, while higher exponents like 3, 5, or 7 create polynomial curves with more complexity.
As the exponent increases:
  • The graph generally becomes steeper, especially as \( x \) moves away from zero.
  • The function's curvature and rate of change increase.
  • The intercept and slope near the origin flatten.
Understanding exponents is key to predicting and interpreting how polynomial functions behave with various values of \( c \). This understanding explains why \( x^1 \) and \( x^7 \) have radically different appearances and slopes.
Odd-Degree Polynomials
Odd-degree polynomials, such as those with exponents of 1, 3, 5, or 7, have unique properties that differentiate them from even-degree polynomials.
One critical feature is that they are symmetric about the origin, meaning they behave similarly in opposite quadrants. For instance, \( x^3 \) and \( x^5 \) cross through the origin, showing symmetry as they curve upwards in the first quadrant and downwards in the third quadrant.
Key characteristics of odd-degree polynomials include:
  • They always have at least one real root, which is the point where they intersect the x-axis, namely the origin in these cases.
  • As \( x \) approaches negative infinity, \( P(x) \) goes to negative infinity; as \( x \) goes to positive infinity, \( P(x) \) goes to positive infinity.
  • The slope also changes direction at least once, producing a turning point when plotted.
Odd-degree polynomials are versatile, stretching and steepening with higher exponents, yet always maintaining these core behaviors.
Function Behavior
Function behavior refers to how a polynomial function behaves or changes as \( x \) increases or decreases, and as the exponent \( c \) changes.
For the function \( P(x) = x^c \), changing \( c \) affects a few key aspects:
  • The values at which the function increases or decreases become more pronounced with higher exponents.
  • The rate at which the graph rises or falls away from the origin increases with larger \( c \).
  • The overall steepness and stretch of the polynomial curve enhances as \( c \) becomes larger.
  • Near the origin, the graph flattens more with increasing \( c \), making curves less steep in a small interval around zero.
By observing and analyzing these behaviors, students can better predict the impact of exponent values on polynomial graphs. Recognizing these patterns aids in thoroughly understanding transformations in graph shapes across different values of \( c \).
To wrap it up, knowing how functions behave with changes in their exponents helps us appreciate the overall dynamics and predict outcomes for different polynomial setups.

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Most popular questions from this chapter

Find all rational zeros of the polynomial, and then find the irrational zeros, if any. Whenever appropriate, use the Rational Zeros Theorem, the Upper and Lower Bounds Theorem, Descartes' Rule of Signs, the quadratic formula, or other factoring techniques. $$P(x)=x^{5}-7 x^{4}+9 x^{3}+23 x^{2}-50 x+24$$

The quadratic formula can be used to solve any quadratic (or second-degree) equation. You may have wondered if similar formulas exist for cubic (third- degree), quartic (fourth-degree), and higher-degree equations. For the depressed cubic \(x^{3}+p x+q=0\) Cardano (page 296 ) found the following formula for one solution: $$x=\sqrt[3]{\frac{-q}{2}+\sqrt{\frac{q^{2}}{4}+\frac{p^{3}}{27}}}+\sqrt[3]{\frac{-q}{2}-\sqrt{\frac{q^{2}}{4}+\frac{p^{3}}{27}}}$$ A formula for quartic equations was discovered by the Italian mathematician Ferrari in \(1540 .\) In 1824 the Norwegian mathematician Niels Henrik Abel proved that it is impossible to write a quintic formula, that is, a formula for fifth-degree equations. Finally, Galois (page 273 ) gave a criterion for determining which equations can be solved by a formula involving radicals. Use the cubic formula to find a solution for the following equations. Then solve the equations using the methods you learned in this section. Which method is easier? (a) \(x^{3}-3 x+2=0\) (b) \(x^{3}-27 x-54=0\) (c) \(x^{3}+3 x+4=0\)

Graph the rational function and find all vertical asymptotes, \(x\)- and \(y\)-intercepts, and local extrema, correct to the nearest decimal. Then use long division to find a polynomial that has the same end behavior as the rational function, and graph both functions in a sufficiently large viewing rectangle to verify that the end behaviors of the polynomial and the rational function are the same. $$r(x)=\frac{4+x^{2}-x^{4}}{x^{2}-1}$$

Find the intercepts and asymptotes, and then sketch a graph of the rational function. Use a graphing device to confirm your answer. $$r(x)=\frac{2 x+6}{-6 x+3}$$

Show that the given values for \(a\) and \(b\) are lower and upper bounds for the real zeros of the polynomial. $$P(x)=3 x^{4}-17 x^{3}+24 x^{2}-9 x+1 ; \quad a=0, b=6$$

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