Discrete Mathematics with Graph Theory
3rd Edition
ISBN: 9780131679955
Author: Edgar G. Goodaire
Publisher: Prentice Hall
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Chapter 0 Solutions
Discrete Mathematics with Graph Theory
Ch. 0.1 - pandq is false if pandq are false.Ch. 0.1 - If pandq is false, then both pandq are false.Ch. 0.1 - True/False Questions
3. It is possible for both “”...Ch. 0.1 - True/False Questions
4. It is possible for both “”...Ch. 0.1 - The implication If 22=5, then 32=9 is true.Ch. 0.1 - The negation of a=b=0 is ab0.Ch. 0.1 - The converse of the implication in Question 5 is...Ch. 0.1 - True/False Questions
8. The double implication “...Ch. 0.1 - It is possible for both an implication and its...Ch. 0.1 - The statement Some frogs have red toes makes use...
Ch. 0.1 - The negation of an existential quantifier is its...Ch. 0.1 -
Classify each of the following statements as...Ch. 0.1 -
Classify each of the following statements as...Ch. 0.1 - 3. Rewrite each of the following statements so...Ch. 0.1 -
4. Determine whether each of the following...Ch. 0.1 - Write down the negation of each of the following...Ch. 0.1 -
6. Write down the converse and contrapositive of...Ch. 0.1 - Rewrite each of the following statements using the...Ch. 0.1 - Is it possible for both an implication and its...Ch. 0.1 - On page 4 of the text, we stated as more or less...Ch. 0.2 - If you want to prove a statement is true, it is...Ch. 0.2 - True/False Questions
2. If you want to prove a...Ch. 0.2 - The sentence A is a sufficient condition for Bis...Ch. 0.2 - True/False Questions
4. If A B, BC, CD, and CA...Ch. 0.2 - True/False Questions
5. If A B, BC, CD, and CA...Ch. 0.2 - The contrapositive of A Bis B A.Ch. 0.2 - A Bis true if and only if its contrapositive is...Ch. 0.2 - True/False Questions
8. is a rational number.
Ch. 0.2 - True/False Questions
9. 3.141 is a rational...Ch. 0.2 - True/False Questions
10. If and are irrational...Ch. 0.2 - True/False Questions
11. The statement “Every...Ch. 0.2 - The statement There exists an irrational number...Ch. 0.2 - What is the hypothesis and what is the conclusion...Ch. 0.2 - 2. In each part of Exercise 1, what condition is...Ch. 0.2 - Exhibit a counterexample to each of the following...Ch. 0.2 - Consider the following two statements: A: The...Ch. 0.2 - Determine whether the following implication is...Ch. 0.2 - State the converse of the implication in Exercise...Ch. 0.2 - 7. Answer Exercise 5 with replaced by .
Ch. 0.2 - Consider the statement A: If n is an integer, nn+1...Ch. 0.2 - 9. Let be an integer greater than 1 and consider...Ch. 0.2 - 10. A theorem in calculus states that every...Ch. 0.2 - 11. Let be an integer, . A certain mathematical...Ch. 0.2 - Consider the assertions A: For every real number...Ch. 0.2 - Answer Exercise 12 with A and B as follows. A:...Ch. 0.2 - 14. Answer true or false and supply a direct proof...Ch. 0.2 - Prove that n an even integer n2+3n is an even...Ch. 0.2 - 16. (a) Let be an integer. Show that either or...Ch. 0.2 - 17. Provide a direct proof that is odd for all...Ch. 0.2 - Prove that 2x24x+30 for any real number x.Ch. 0.2 - 19. Let and be integers. By examining the four...Ch. 0.2 - Let n be an integer. Prove that n2 is even if and...Ch. 0.2 - Prob. 21ECh. 0.2 - Prove that if n is an odd integer then there is an...Ch. 0.2 - 23. Prove that if is an odd integer, there is an...Ch. 0.2 - 24. Prove that there exists no smallest positive...Ch. 0.2 - 25. Let be the product of positive integers and ....Ch. 0.2 - 26. (For students who have studied linear algebra)...Ch. 0.2 - 27. (a) Suppose and are integers such that . Prove...Ch. 0.2 - Suppose a and b are integers such that a+b+ab=0....Ch. 0.2 - Suppose a is an irrational number. Prove that 1a...Ch. 0.2 - 30. Suppose that is a rational number and that is...Ch. 0.2 - Prob. 31ECh. 0.2 - 32. Find a proof or exhibit a counterexample to...Ch. 0.2 - Prob. 33ECh. 0.2 - Prob. 34ECh. 0.2 - Prob. 35ECh. 0.2 - Prob. 36ECh. 0.2 - Prob. 37ECh. 0.2 - Prove that there exist irrational numbers a and b...Ch. 0 - State, with a reason, whether each of the...Ch. 0 - Prob. 2RECh. 0 - 3. Write down the converse, the contrapositive and...Ch. 0 - Prob. 4RECh. 0 - Prob. 5RECh. 0 - Prob. 6RECh. 0 - Prob. 7RECh. 0 - Prob. 8RECh. 0 - 9. Let be an integer. Prove that is odd if and...Ch. 0 - Give a direct proof of the fact that a25a+6 is...Ch. 0 - Prob. 11RECh. 0 - Prob. 12RECh. 0 - 13. Prove, by way of contradiction, that if is a...Ch. 0 - Prob. 14RECh. 0 - Prob. 15RECh. 0 - Prob. 16RECh. 0 - Prob. 17RECh. 0 - Prob. 18RECh. 0 - Each of the integers 31, 331, 3331, 33331, 333331,...
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- Use the Euclidean algorithm to find two sets of integers (a, b, c) such that 55a65b+143c: Solution = 1. By the Euclidean algorithm, we have: 143 = 2.65 + 13 and 65 = 5.13, so 13 = 143 – 2.65. - Also, 55 = 4.13+3, 13 = 4.3 + 1 and 3 = 3.1, so 1 = 13 — 4.3 = 13 — 4(55 – 4.13) = 17.13 – 4.55. Combining these, we have: 1 = 17(143 – 2.65) - 4.55 = −4.55 - 34.65 + 17.143, so we can take a = − −4, b = −34, c = 17. By carrying out the division algorithm in other ways, we obtain different solutions, such as 19.55 23.65 +7.143, so a = = 9, b -23, c = 7. = = how ? come [Note that 13.55 + 11.65 - 10.143 0, so we can obtain new solutions by adding multiples of this equation, or similar equations.]arrow_forwardCelina is picking a new frame for a custom piece of artwork. She has to select a frame size, material, and color. There are four different frame sizes, three different frame materials, and six different frame colors. She must chose one option only from each category. How many different possible frames could Celina pick from?arrow_forwardIn a company with 80 employees, 60 earn $10.00 per hour and 20 earn $13.00 per hour. Is this average hourly wage considered representative?arrow_forward
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