Textbook Question
Use an end behavior diagram, as shown below, to describe the end behavior of the graph of each polynomial function. ƒ(x)=4x7-x5+x3-1
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Ch. 3 - Polynomial and Rational Functions
Lial13th EditionCollege AlgebraISBN: 9780136881063
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Table of contents
Chapter 4, Problem 24
Use synthetic division to perform each division. x7+1 / x+1
Verified step by step guidance1
Identify the divisor and the dividend. Here, the divisor is \(x + 1\), and the dividend is \(x^7 + 1\).
Set up synthetic division by using the zero of the divisor. Since the divisor is \(x + 1\), the zero is \(-1\).
Write down the coefficients of the dividend polynomial \(x^7 + 1\). Since some powers of \(x\) are missing, include zeros for those terms: \$1, 0, 0, 0, 0, 0, 0, 1$.
Perform synthetic division: bring down the first coefficient, multiply it by \(-1\), add to the next coefficient, and repeat this process across all coefficients.
The numbers obtained at the end (except the last one) represent the coefficients of the quotient polynomial, and the last number is the remainder.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Synthetic Division
Synthetic division is a shortcut method for dividing a polynomial by a linear binomial of the form x - c. It simplifies the long division process by using only the coefficients of the polynomial, making calculations faster and less error-prone.
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Polynomial Coefficients and Setup
To use synthetic division, you must list all coefficients of the dividend polynomial in descending order of degree, including zeros for any missing terms. This ensures the division process accounts for every power of x correctly.
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Interpreting the Result
The output of synthetic division includes the coefficients of the quotient polynomial and a remainder. Understanding how to write the quotient in polynomial form and interpret the remainder is essential for completing the division problem.
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Related Practice
Textbook Question
Use one of the end behavior diagrams below, to describe the end behavior of the graph of each polynomial function.
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