Polynomial Functions Quiz
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Questions and Answers

Where is STAR EDUCATIONAL BOOKS DISTRIBUTORS Pvt.Ltd. located?

  • New Delhi – 110002, INDIA (correct)
  • P.O.Box 21073, Ethiopia
  • Arat Kilo, Ethiopia
  • Addis Ababa, Ethiopia
  • What is the primary purpose of the text provided?

  • To advertise an educational book distributor
  • To explain the copyright laws of Ethiopia (correct)
  • To describe the development process of a textbook.
  • To provide information about the history of Ethiopian education
  • What is the correct contact information for addressing any copyright issues related to the book?

  • ASTER NEGA PUBLISHING ENTERPRISE, P.O.Box 21073, Addis Ababa, Ethiopia
  • Encarta Encyclopedia, 2009 edition
  • Ministry of Education, Head Office, Arat Kilo, (PO Box 1367), Addis Ababa, Ethiopia (correct)
  • STAR EDUCATIONAL BOOKS DISTRIBUTORS Pvt.Ltd., 24/4800, Bharat Ram Road, Daryaganj, New Delhi – 110002, INDIA
  • What is the role of the Ministry of Education in the context of this text?

    <p>To enforce copyright laws related to the book</p> Signup and view all the answers

    From the information provided, which of these options is the most likely reason why the text mentions the Ministry of Education?

    <p>To emphasize the legal rights to the book’s content</p> Signup and view all the answers

    What is the importance of understanding the concept of 'good care' in various contexts?

    <p>It helps in making informed decisions.</p> Signup and view all the answers

    Which of the following best describes the consequences of neglecting 'good care'?

    <p>Potential harm to relationships.</p> Signup and view all the answers

    Why is it crucial for individuals to practice 'good care' towards themselves and others?

    <p>To build a supportive community.</p> Signup and view all the answers

    What does the term 'good care' primarily aim to address?

    <p>Physical and emotional safety.</p> Signup and view all the answers

    In what ways can 'good care' impact personal development?

    <p>It supports resilience and growth.</p> Signup and view all the answers

    What might be a negative outcome of not practicing 'good care'?

    <p>Increased stress levels.</p> Signup and view all the answers

    How does 'good care' contribute to community well-being?

    <p>By encouraging empathy and support.</p> Signup and view all the answers

    What is a potential misconception about 'good care'?

    <p>It is only important for children.</p> Signup and view all the answers

    Which of the following expressions represents a polynomial function?

    <p>g - f</p> Signup and view all the answers

    What is the degree of the function f(x) = 3x^2 - 5?

    <p>2</p> Signup and view all the answers

    If f(x) = x^2 - 5x + 6, what is the result of the expression f(x + 1)?

    <p>x^2 - 7x + 11</p> Signup and view all the answers

    Which expression results in a polynomial function when multiplying two polynomial functions f and g?

    <p>f * g</p> Signup and view all the answers

    Given f(x) = x^2 - x - 6, identify the roots of the polynomial.

    <p>-2 and 3</p> Signup and view all the answers

    What is the result of the expression f - g if f(x) = -7x^2 + x - 8 and g(x) = 2x^2 - x + 1?

    <p>-5x^2 + 2x - 9</p> Signup and view all the answers

    When given f(x) = 1 - x^3 + 6x^2 - 8x and g(x) = x^3 + 10, what are the degrees of f and g?

    <p>3 and 0</p> Signup and view all the answers

    Which operation performed on polynomial functions will not yield a polynomial?

    <p>f / g</p> Signup and view all the answers

    What does the Remainder Theorem state about polynomials?

    <p>The remainder of a polynomial divided by (x - c) is equal to f(c).</p> Signup and view all the answers

    Using the Remainder Theorem, what is the remainder when f(x) = 2x^2 + 3x + 1 is divided by x - (-1)?

    <p>6</p> Signup and view all the answers

    What is the result of f(1) if f(x) = x^4 + x^2 + 2x + 5?

    <p>9</p> Signup and view all the answers

    When dividing f(x) = x^3 - x^2 + 8x - 1 by d(x) = x + 2, what is the remainder according to the polynomial division theorem?

    <p>-29</p> Signup and view all the answers

    Given f(x) = x^3 - 2x^2 + 3bx + 10 and that the remainder is 37 when divided by x - 3, solving f(3) = 37 requires what value of b?

    <p>3</p> Signup and view all the answers

    What is the purpose of the polynomial division theorem in polynomial functions?

    <p>To find factors of the polynomial.</p> Signup and view all the answers

    When applying the Remainder Theorem, which of the following equations represents the relationship used to find the remainder?

    <p>f(x) = (x - c) q(x) + k</p> Signup and view all the answers

    What is the coefficient of x in the polynomial f(x) = 3x^3 - x^4 + 2 when evaluated?

    <p>0</p> Signup and view all the answers

    If the degree of a polynomial is less than the degree of its divisor, what can be said about the remainder?

    <p>The remainder will be a polynomial of degree less than the divisor.</p> Signup and view all the answers

    Given polynomials f(x) and d(x), where d(x) ≠ 0 and the degree of d(x) is less than or equal to the degree of f(x), what does the Polynomial Division Theorem guarantee?

    <p>The existence of unique polynomials <em>q(x)</em> and <em>r(x)</em> such that <em>f(x) = d(x) q(x) + r(x)</em>.</p> Signup and view all the answers

    What is the purpose of the proof for the Polynomial Division Theorem?

    <p>To demonstrate that the quotient and remainder polynomials are unique for a specific division.</p> Signup and view all the answers

    In the Polynomial Division Theorem, if r(x) = 0, what does this indicate about the relationship between f(x) and d(x)?

    <p><em>d(x)</em> divides exactly into <em>f(x)</em>.</p> Signup and view all the answers

    What is the relationship between the degrees of polynomials r(x) and d(x) in the Polynomial Division Theorem?

    <p>The degree of <em>r(x)</em> is always less than the degree of <em>d(x)</em>, or <em>r(x) = 0</em>.</p> Signup and view all the answers

    Given f(x) = 2x³ - 3x + 1 and d(x) = x + 2, what are the polynomials q(x) and r(x) in the Polynomial Division Theorem?

    <p><em>q(x) = 2x² - 4x + 5</em> and <em>r(x) = -9</em></p> Signup and view all the answers

    If f(x) = x³ - 2x² + x + 5 and d(x) = x² + 1, in which case would the remainder be zero?

    <p>The remainder is never zero, as <em>f(x)</em> doesn't divide exactly into <em>d(x)</em>.</p> Signup and view all the answers

    In the process of polynomial division, which of the following is NOT a direct consequence of the Polynomial Division Theorem?

    <p>The possibility of having a remainder polynomial, <em>r(x)</em>, with a degree equal to the degree of <em>d(x)</em>.</p> Signup and view all the answers

    What is the remainder when the polynomial $f(x) = x^3 - 5x^2 + 2x + 8$ is divided by $x - 2$?

    <p>0</p> Signup and view all the answers

    When the polynomial $f(x)=3x^7 - ax^6 + 5x^3 - x + 11$ is divided by $x+1$, the remainder is 15. What is the value of a ?

    <p>2</p> Signup and view all the answers

    If $f(x) = x^4 + 2x^3 + 5x^2 + 1$ and $c = -\frac{2}{3}$, what is the value of the remainder when $f(x)$ is divided by $x - c$?

    <p>2</p> Signup and view all the answers

    Which of the following statements about the Factor Theorem is TRUE?

    <p>The Factor Theorem states that $x - c$ is a factor of $f(x)$ if and only if $f(c) = 0$.</p> Signup and view all the answers

    What is the remainder when the polynomial $f(x) = x^{17} - 1$ is divided by $x - 1$?

    <p>0</p> Signup and view all the answers

    Which of the following is NOT a factor of the polynomial $f(x) = x^3 - 3x^2 - x + 3$?

    <p>$x + 3$</p> Signup and view all the answers

    When the polynomial $f(x) = ax^3 + bx^2 - 2x + 8$ is divided by $x - 1$, the remainder is 3. What is the value of a + b?

    <p>1</p> Signup and view all the answers

    Which of the following statements is TRUE about the Remainder Theorem?

    <p>The Remainder Theorem states that the remainder when a polynomial is divided by a linear expression is equal to the value of the polynomial at the root of the linear expression.</p> Signup and view all the answers

    Study Notes

    Polynomial Functions

    • Polynomial Division Theorem: If f(x) and d(x) are polynomials with d(x) ≠ 0, and the degree of d(x) is less than or equal to the degree of f(x), then unique polynomials q(x) and r(x) exist such that f(x) = d(x)q(x) + r(x). Remainder r(x) has a degree less than d(x) or is zero. If r(x) = 0, then d(x) divides f(x) exactly.

    Remainder Theorem

    • If a polynomial f(x) of degree ≥ 1 is divided by the linear polynomial (x - c), the remainder is f(c).

    Factor Theorem

    • If (x - c) is a factor of polynomial f(x), then f(c) = 0.
    • Conversely, if f(c) = 0, then (x - c) is a factor of f(x).

    Examples and Applications

    • Example 1 (Polynomial Division): Given polynomials f(x) and d(x), find q(x) and r(x) such that f(x) = d(x)q(x) + r(x). Solutions provided for various examples.
    • Example 2 (Remainder Calculation): Determine the remainder when f(x) is divided by d(x) using polynomial division and remainder theorems. Solutions are shown.
    • Example 3 (Finding a Coefficient): Find the value of 'b' in a polynomial given that the remainder is known when divided by x - c.
    • Exercise 1.5 Provides practice problems for expressing a polynomial in the form f(x) = (x - c)q(x) + r(x)

    Key Concepts

    • Dividend, Divisor, Quotient, Remainder in the context of polynomial division. The polynomial division theorem shows the relationship among those four.
    • Degree of a polynomial: Significance of the degrees of polynomials in polynomial division, determining proper/improper functions, and the factor theorem. Degree of the remainder is less than the divisor, or zero.
    • Polynomial functions: Operations on polynomial functions (addition, subtraction, multiplication).

    Additional Notes

    • Textbook is for Grade 10 Mathematics, published in 2002 by the Ethiopian Ministry of Education.
    • Textbook mentions using protective materials and handling books carefully to ensure longevity.

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    Description

    Test your knowledge on polynomial functions, including the Polynomial Division Theorem, Remainder Theorem, and Factor Theorem. This quiz will help you understand concepts such as finding quotients and remainders, as well as identifying factors of polynomials through various examples and applications.

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