Elements Of Modern Algebra
8th Edition
ISBN: 9781285463230
Author: Gilbert, Linda, Jimmie
Publisher: Cengage Learning,
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Chapter 8.3, Problem 25E
To determine
To prove:
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(3) Let f: R→ R be defined by f(x) = 5x³ - 7x - 10. Prove that if |x| ≤ 3, then |f(x)| ≤ 166.
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f₂: R → R, f₂(x)
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f₁:R → R, f₁(x) = x + x + x + x + 4
f4: R → R, f4(x) =
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= x
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Let f(x)=x2, g(x)=2x+5, and h(x)=x2-1
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Chapter 8 Solutions
Elements Of Modern Algebra
Ch. 8.1 - True or False
Label each of the following...Ch. 8.1 - Prob. 2TFECh. 8.1 - Prob. 3TFECh. 8.1 - Prob. 4TFECh. 8.1 - Prob. 5TFECh. 8.1 - Prob. 6TFECh. 8.1 - Prob. 7TFECh. 8.1 - Prob. 1ECh. 8.1 - Prob. 2ECh. 8.1 - Prob. 3E
Ch. 8.1 - Consider the following polynomial over Z9, where a...Ch. 8.1 - 5. Decide whether each of the following subset is...Ch. 8.1 - Determine which subset in Exercise 5 are ideals of...Ch. 8.1 - Prove that [ x ]={ a0+a1x+...+anxna0=2kfork }, the...Ch. 8.1 - Prob. 8ECh. 8.1 - Prob. 9ECh. 8.1 - Let R be a commutative ring with unity. Prove that...Ch. 8.1 - 11. a. List all the polynomials in that have...Ch. 8.1 - a. Find a nonconstant polynomial in Z4[ x ], if...Ch. 8.1 - Prob. 13ECh. 8.1 - 14. Prove or disprove that is a field if is a...Ch. 8.1 - 15. Prove that if is an ideal in a commutative...Ch. 8.1 - a. If R is a commutative ring with unity, show...Ch. 8.1 - Prob. 17ECh. 8.1 - 18. Let be a commutative ring with unity, and let...Ch. 8.1 - Prob. 19ECh. 8.1 - Consider the mapping :Z[ x ]Zk[ x ] defined by...Ch. 8.1 - Describe the kernel of epimorphism in Exercise...Ch. 8.1 - Assume that each of R and S is a commutative ring...Ch. 8.1 - Describe the kernel of epimorphism in Exercise...Ch. 8.1 - Prob. 24ECh. 8.1 - (See exercise 24.) Show that the relation...Ch. 8.2 - Label each of the following statements as either...Ch. 8.2 - Prob. 2TFECh. 8.2 - Prob. 3TFECh. 8.2 - Prob. 1ECh. 8.2 - Prob. 2ECh. 8.2 - Prob. 3ECh. 8.2 - For , , and given in Exercises 1-6, find and in...Ch. 8.2 - Prob. 5ECh. 8.2 - For , , and given in Exercises 1-6, find and in...Ch. 8.2 - Prob. 7ECh. 8.2 - Prob. 8ECh. 8.2 - Prob. 9ECh. 8.2 - Prob. 10ECh. 8.2 - For f(x), g(x), and Zn[ x ] given in Exercises...Ch. 8.2 - For f(x), g(x), and Zn[ x ] given in Exercises...Ch. 8.2 - Prob. 13ECh. 8.2 - Prob. 14ECh. 8.2 - Prob. 15ECh. 8.2 - Prob. 16ECh. 8.2 - Prob. 17ECh. 8.2 - Prob. 18ECh. 8.2 - Prob. 19ECh. 8.2 - Prob. 20ECh. 8.2 - Prob. 21ECh. 8.2 - Prob. 22ECh. 8.2 - Prob. 23ECh. 8.2 - Prob. 24ECh. 8.2 - Prob. 25ECh. 8.2 - Prob. 26ECh. 8.2 - Prob. 27ECh. 8.2 - Prob. 28ECh. 8.2 - Prob. 29ECh. 8.2 - Prob. 30ECh. 8.2 - Prob. 31ECh. 8.2 - Prob. 32ECh. 8.2 - Prob. 33ECh. 8.2 - Prob. 34ECh. 8.2 - Prob. 35ECh. 8.3 - True or False
Label each of the following...Ch. 8.3 - Label each of the following statements as either...Ch. 8.3 - Prob. 3TFECh. 8.3 - True or False
Label each of the following...Ch. 8.3 - Prob. 5TFECh. 8.3 - Prob. 6TFECh. 8.3 - Prob. 7TFECh. 8.3 - True or False
Label each of the following...Ch. 8.3 - Prob. 9TFECh. 8.3 - Prob. 1ECh. 8.3 - Let Q denote the field of rational numbers, R the...Ch. 8.3 - Find all monic irreducible polynomials of degree 2...Ch. 8.3 - Write each of the following polynomials as a...Ch. 8.3 - Let F be a field and f(x)=a0+a1x+...+anxnF[x]....Ch. 8.3 - Prove Corollary 8.18: A polynomial of positive...Ch. 8.3 - Corollary requires that be a field. Show that...Ch. 8.3 - Let be an irreducible polynomial over a field ....Ch. 8.3 - Let be a field. Prove that if is a zero of then...Ch. 8.3 - Prob. 10ECh. 8.3 - Prob. 11ECh. 8.3 - Prob. 12ECh. 8.3 - Prob. 13ECh. 8.3 - Prob. 14ECh. 8.3 - Prob. 15ECh. 8.3 - Prob. 16ECh. 8.3 - Suppose that f(x),g(x), and h(x) are polynomials...Ch. 8.3 - Prove that a polynomial f(x) of positive degree n...Ch. 8.3 - Prove Theorem Suppose is an irreducible...Ch. 8.3 - Prove Theorem If and are relatively prime...Ch. 8.3 - Prove the Unique Factorization Theorem in ...Ch. 8.3 - Let ab in a field F. Show that x+a and x+b are...Ch. 8.3 - Let f(x),g(x),h(x)F[x] where f(x) and g(x) are...Ch. 8.3 - Prob. 24ECh. 8.3 - Prob. 25ECh. 8.3 - Prob. 26ECh. 8.3 - Prob. 27ECh. 8.4 - Label each of the following statements as either...Ch. 8.4 - Prob. 2TFECh. 8.4 - Prob. 3TFECh. 8.4 - Prob. 4TFECh. 8.4 - Prob. 5TFECh. 8.4 - Prob. 6TFECh. 8.4 - Prob. 7TFECh. 8.4 - Prob. 8TFECh. 8.4 - Prob. 9TFECh. 8.4 - Prob. 10TFECh. 8.4 - True or False
Label each of the following...Ch. 8.4 - Prob. 12TFECh. 8.4 - Prob. 13TFECh. 8.4 - Prob. 14TFECh. 8.4 - Prob. 15TFECh. 8.4 - 1. Find a monic polynomial of least degree over ...Ch. 8.4 - One of the zeros is given for each of the...Ch. 8.4 - Prob. 3ECh. 8.4 - Prob. 4ECh. 8.4 - Prob. 5ECh. 8.4 - Prob. 6ECh. 8.4 - Prob. 7ECh. 8.4 - Prob. 8ECh. 8.4 - Prob. 9ECh. 8.4 - Prob. 10ECh. 8.4 - Prob. 11ECh. 8.4 - Prob. 12ECh. 8.4 - Factor each of the polynomial in Exercise as a...Ch. 8.4 - Factor each of the polynomial in Exercise as a...Ch. 8.4 - Prob. 15ECh. 8.4 - Factors each of the polynomial in Exercise 1316 as...Ch. 8.4 - Prob. 17ECh. 8.4 - Show that the converse of Eisenstein’s...Ch. 8.4 - Prob. 19ECh. 8.4 - Prob. 20ECh. 8.4 - Use Theorem to show that each of the following...Ch. 8.4 - Prob. 22ECh. 8.4 - Prove that for complex numbers .
Ch. 8.4 - Prob. 24ECh. 8.4 - Prob. 25ECh. 8.4 - Prob. 26ECh. 8.4 - Prob. 27ECh. 8.4 - Prob. 28ECh. 8.4 - Prob. 29ECh. 8.4 - Prob. 30ECh. 8.4 - Prob. 31ECh. 8.4 - Prob. 32ECh. 8.4 - Let where is a field and let . Prove that if is...Ch. 8.4 - Prob. 34ECh. 8.4 - Prob. 35ECh. 8.5 - Prob. 1TFECh. 8.5 - Prob. 2TFECh. 8.5 - Prob. 3TFECh. 8.5 - Prob. 4TFECh. 8.5 - Prob. 1ECh. 8.5 - Prob. 2ECh. 8.5 - Prob. 3ECh. 8.5 - Prob. 4ECh. 8.5 - Prob. 5ECh. 8.5 - Prob. 6ECh. 8.5 - In Exercises , use the techniques presented in...Ch. 8.5 - Prob. 8ECh. 8.5 - Prob. 9ECh. 8.5 - Prob. 10ECh. 8.5 - Prob. 11ECh. 8.5 - Prob. 12ECh. 8.5 - Prob. 13ECh. 8.5 - Prob. 14ECh. 8.5 - Prob. 15ECh. 8.5 - Prob. 16ECh. 8.5 - Prob. 17ECh. 8.5 - Prob. 18ECh. 8.5 - Prob. 19ECh. 8.5 - Prob. 20ECh. 8.5 - Prob. 21ECh. 8.5 - Prob. 22ECh. 8.5 - Prob. 23ECh. 8.5 - Prob. 24ECh. 8.5 - Prob. 25ECh. 8.5 - Prob. 26ECh. 8.5 - Prob. 27ECh. 8.5 - Prob. 28ECh. 8.5 - Prob. 29ECh. 8.5 - Prob. 30ECh. 8.5 - Derive the quadratic formula by using the change...Ch. 8.5 - Prob. 32ECh. 8.6 - True or False
Label each of the following...Ch. 8.6 - Prob. 2TFECh. 8.6 - Prob. 3TFECh. 8.6 - Prob. 1ECh. 8.6 - Prob. 2ECh. 8.6 - Prob. 3ECh. 8.6 - In Exercises, a field , a polynomial over , and...Ch. 8.6 - In Exercises , a field , a polynomial over , and...Ch. 8.6 - In Exercises , a field , a polynomial over , and...Ch. 8.6 - Prob. 7ECh. 8.6 - If is a finite field with elements, and is a...Ch. 8.6 - Construct a field having the following number of...Ch. 8.6 - Prob. 10ECh. 8.6 - Prob. 11ECh. 8.6 - Prob. 12ECh. 8.6 - Prob. 13ECh. 8.6 - Prob. 14ECh. 8.6 - Prob. 15ECh. 8.6 - Each of the polynomials in Exercises is...Ch. 8.6 - Prob. 17ECh. 8.6 - Prob. 18E
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- If a functionfis increasing on (a,b) and decreasing on (b,c) , then what can be said about the local extremum offon (a,c) ?arrow_forwardSuppose f and g are non-constant, differentiable, realvalued functions defined on (−∞, ∞). Furthermore, suppose that for each pair of real numbers x and y, f(x + y) = f(x)f(y) − g(x)g(y) and g(x + y) = f(x)g(y) + g(x)f(y). If f′(0) = 0, prove that ( f(x))2 + (g(x))2 = 1 for all x.arrow_forwardLet us define a number a to be a fixed point of a function f if a = f(a). (For example, if f (x) = -x², then x = -1 is a fixed point because f(–1) = -1.) Prove that if f'(x) # 1 for all numbers x, then f has at most one fixed point.arrow_forward
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