Discrete Mathematics with Graph Theory (Classic Version) (3rd Edition) (Pearson Modern Classics for Advanced Mathematics Series)
Discrete Mathematics with Graph Theory (Classic Version) (3rd Edition) (Pearson Modern Classics for Advanced Mathematics Series)
3rd Edition
ISBN: 9780134689555
Author: Edgar Goodaire, Michael Parmenter
Publisher: PEARSON
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Textbook Question
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Chapter 3, Problem 1RE

Define f : Z×Z Z by f ( a , b ) = a b . Determine whether f is one-to-one.

Expert Solution & Answer
Check Mark
To determine

Whether f is one-to-one or not.

Answer to Problem 1RE

Solution: f is not one-to-one.

Explanation of Solution

Given Information:

Define f:Z×ZZ by f(a,b)=ab

Explanation:

For one-one

(a,b)=(c,d) if f(a,b)=f(c,d).

As,

f(a,b)=f(c,d)ab=cd

But a and b are not always equal to c and d to satisfy the above condition.

For example:

f(2,2)=4=f(3,1)(2,2)(3,1)

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Chapter 3 Solutions

Discrete Mathematics with Graph Theory (Classic Version) (3rd Edition) (Pearson Modern Classics for Advanced Mathematics Series)

Ch. 3.1 - Prob. 11TFQCh. 3.1 - Prob. 12TFQCh. 3.1 - Determine whether each of the following relation...Ch. 3.1 - 2. Suppose A is the set of students currently...Ch. 3.1 - Prob. 3ECh. 3.1 - Prob. 4ECh. 3.1 - Prob. 5ECh. 3.1 - Prob. 6ECh. 3.1 - Prob. 7ECh. 3.1 - Prob. 8ECh. 3.1 - Prob. 9ECh. 3.1 - Prob. 10ECh. 3.1 - Prob. 11ECh. 3.1 - Prob. 12ECh. 3.1 - Prob. 13ECh. 3.1 - Define g:ZB by g(x)=|x|+1. Determine (with...Ch. 3.1 - Define f:AA by f(x)=3x+5. Determine (with reasons)...Ch. 3.1 - 16. Define by . Determine (with reasons) whether...Ch. 3.1 - Prob. 17ECh. 3.1 - Prob. 18ECh. 3.1 - Prob. 19ECh. 3.1 - Define f:RR by f(x)=3x3+x. Graph f to determine...Ch. 3.1 - 21. (a) Define by . Graph g to determine whether g...Ch. 3.1 - Prob. 22ECh. 3.1 - 23. Let a, b, c be real numbers and define by ....Ch. 3.1 - 24. For each of the following, find the largest...Ch. 3.1 - Prob. 25ECh. 3.1 - Let S be a set containing the number 5. Let...Ch. 3.1 - Prob. 27ECh. 3.1 - Prob. 28ECh. 3.1 - Prob. 29ECh. 3.1 - Prob. 30ECh. 3.1 - Prob. 31ECh. 3.1 - Prob. 32ECh. 3.1 - Prob. 33ECh. 3.1 - Prob. 34ECh. 3.2 - True/False Questions The function defines by ...Ch. 3.2 - True/False Questions The function f:ZZ defines by...Ch. 3.2 - Prob. 3TFQCh. 3.2 - Prob. 4TFQCh. 3.2 - Prob. 5TFQCh. 3.2 - Prob. 6TFQCh. 3.2 - Prob. 7TFQCh. 3.2 - Prob. 8TFQCh. 3.2 - Prob. 9TFQCh. 3.2 - Prob. 10TFQCh. 3.2 - Let . Find the inverse of each of the following...Ch. 3.2 - 2. Define by . Find a formula for . Ch. 3.2 - Define f:(,0][0,) by f(x)=x2. Find a formula for...Ch. 3.2 - 4. Define by . Find a formula for . Ch. 3.2 - Prob. 5ECh. 3.2 - Prob. 6ECh. 3.2 - Show that each of the following functions f:AH is...Ch. 3.2 - Prob. 8ECh. 3.2 - Prob. 9ECh. 3.2 - Prob. 10ECh. 3.2 - 11. Let and define functions by and . Find (a) ...Ch. 3.2 - Prob. 12ECh. 3.2 - Prob. 13ECh. 3.2 - Prob. 14ECh. 3.2 - Prob. 15ECh. 3.2 - Prob. 16ECh. 3.2 - 17. Let A denote the set . Let i denote the...Ch. 3.2 - Prob. 18ECh. 3.2 - Prob. 19ECh. 3.2 - Prob. 20ECh. 3.2 - Prob. 21ECh. 3.2 - Prob. 22ECh. 3.2 - Prob. 23ECh. 3.2 - Prob. 24ECh. 3.2 - Is the composition of two bijective functions...Ch. 3.2 - 26. Define by . (a) Find the values of . (b) Guess...Ch. 3.2 - Prob. 27ECh. 3.2 - Prob. 28ECh. 3.3 - True/False Questions If sets A and B are in...Ch. 3.3 - Prob. 2TFQCh. 3.3 - Prob. 3TFQCh. 3.3 - Prob. 4TFQCh. 3.3 - True/False Questions If A and B are finite sets...Ch. 3.3 - True/False Questions If the conditions of...Ch. 3.3 - Prob. 7TFQCh. 3.3 - Prob. 8TFQCh. 3.3 - Prob. 9TFQCh. 3.3 - Prob. 10TFQCh. 3.3 - Prob. 1ECh. 3.3 - At first glance, the perfect squares 1, 4, 9, 16,...Ch. 3.3 - Prob. 3ECh. 3.3 - Prob. 4ECh. 3.3 - Prob. 5ECh. 3.3 - Prob. 6ECh. 3.3 - Prob. 7ECh. 3.3 - Prob. 8ECh. 3.3 - Prob. 9ECh. 3.3 - Prob. 10ECh. 3.3 - Prove that the notion of same cardinality is an...Ch. 3.3 - Prob. 12ECh. 3.3 - Prob. 13ECh. 3.3 - Prob. 14ECh. 3.3 - Prob. 15ECh. 3.3 - Prob. 16ECh. 3.3 - Prob. 17ECh. 3.3 - Prob. 18ECh. 3.3 - Prob. 19ECh. 3.3 - Prob. 20ECh. 3.3 - Prob. 21ECh. 3.3 - 22. Given an example of each of the following or...Ch. 3.3 - Prob. 23ECh. 3.3 - Prob. 24ECh. 3.3 - Prove that the points of a plane and the points of...Ch. 3.3 - Prob. 26ECh. 3.3 - 27. (a) Show that if A and B are countable sets...Ch. 3.3 - Prob. 28ECh. 3.3 - 29. Let S be the set of all real numbers in the...Ch. 3.3 - Let S be the set of all real numbers in the...Ch. 3.3 - Prob. 31ECh. 3 - Define by . Determine whether f is one-to-one. Ch. 3 - Let f={(1,2),(2,3),(3,4),(4,1)} and...Ch. 3 - Prob. 3RECh. 3 - Prob. 4RECh. 3 - 5. Answer these questions for each of the given...Ch. 3 - Prob. 6RECh. 3 - Prob. 7RECh. 3 - Prob. 8RECh. 3 - Prob. 9RECh. 3 - Prob. 10RECh. 3 - Prob. 11RECh. 3 - Prob. 12RECh. 3 - Prob. 13RECh. 3 - Prob. 14RECh. 3 - Prob. 15RECh. 3 - Prob. 16RECh. 3 - Prob. 17RECh. 3 - Prob. 18RECh. 3 - Prob. 19RECh. 3 - Let S be the set of all real numbers in the...Ch. 3 - Prob. 21RE

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