BuyFind

Elements Of Modern Algebra

8th Edition
Gilbert + 2 others
Publisher: Cengage Learning,
ISBN: 9781285463230
BuyFind

Elements Of Modern Algebra

8th Edition
Gilbert + 2 others
Publisher: Cengage Learning,
ISBN: 9781285463230
Chapter 2.5, Problem 47E
Textbook Problem

In the congruences a x b ( m o d   n ) in Exercises 40 53 , a and n may not be relatively prime. Use the results in Exercises 38 and 39 to determine whether there are solutions. If there are, find d incongruent solutions modulo n .

24 x + 5 50   ( m o d  348 )

Expert Solution
To determine

Whether there are solutions of congruence 24x+550(mod348). If there are, find d incongruent solutions modulo 348.

Explanation of Solution

Formula used:

i) For d=(a,n), where n>1, if there is a solution to axb(modn), then d divides b.

ii) Theorem: Addition and Multiplication Properties:

If ab(modn) and x is any integer, then

a+x=b+x(modn) and ax=bx(modn).

Explanation:

Given, 24x+550(mod348).

By adding property of congruence’s,

24x+5+(5)(50+(5))(mod348)

24x45(mod348)<

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Chapter 2 Solutions

Elements Of Modern Algebra
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Ch. 2.1 - Prove that the equalities in Exercises 111 hold...Ch. 2.1 - Prove that the equalities in Exercises hold for...Ch. 2.1 - Prove that the equalities in Exercises hold for...Ch. 2.1 - Prove that the equalities in Exercises hold for...Ch. 2.1 - Prove that the equalities in Exercises hold for...Ch. 2.1 - Prove that the equalities in Exercises hold for...Ch. 2.1 - Prove that the equalities in Exercises 111 hold...Ch. 2.1 - Prove that the equalities in Exercises hold for...Ch. 2.1 - Prove that the equalities in Exercises hold for...Ch. 2.1 - Prove that the equalities in Exercises hold for...Ch. 2.1 - Prove that the equalities in Exercises hold for...Ch. 2.1 - Let A be a set of integers closed under...Ch. 2.1 - In Exercises , prove the statements concerning the...Ch. 2.1 - In Exercises , prove the statements concerning the...Ch. 2.1 - In Exercises 1324, prove the statements concerning...Ch. 2.1 - In Exercises 1324, prove the statements concerning...Ch. 2.1 - In Exercises , prove the statements concerning the...Ch. 2.1 - In Exercises , prove the statements concerning the...Ch. 2.1 - In Exercises 13-24, prove the statements...Ch. 2.1 - In Exercises 1324, prove the statements concerning...Ch. 2.1 - In Exercises , prove the statements concerning the...Ch. 2.1 - In Exercises , prove the statements concerning the...Ch. 2.1 - In Exercises 1324, prove the statements concerning...Ch. 2.1 - In Exercises , prove the statements concerning the...Ch. 2.1 - 25. Prove that if and are integers and, then...Ch. 2.1 - Prove that the cancellation law for multiplication...Ch. 2.1 - Let x and y be in Z, not both zero, then x2+y2Z+.Ch. 2.1 - For an integer x, the absolute value of x is...Ch. 2.1 - For an integer x, the absolute value of x is...Ch. 2.1 - For an integer , the absolute value of is denoted...Ch. 2.1 - 31. Prove that if is positive and is negative,...Ch. 2.1 - 32. Prove that if is positive and is positive,...Ch. 2.1 - 33. Prove that if is positive and is negative,...Ch. 2.1 - Prove or disprove that 0x2xy+y2 for all x and y in...Ch. 2.1 - 35. Consider the set consisting of alone, with...Ch. 2.2 - Prove that the statements in Exercises are true...Ch. 2.2 - Prove that the statements in Exercises are true...Ch. 2.2 - Prove that the statements in Exercises are true...Ch. 2.2 - Prove that the statements in Exercises are true...Ch. 2.2 - Prove that the statements in Exercises are true...Ch. 2.2 - Prove that the statements in Exercises 116 are...Ch. 2.2 - Prove that the statements in Exercises are true...Ch. 2.2 - Prove that the statements in Exercises 116 are...Ch. 2.2 - Prove that the statements in Exercises are true...Ch. 2.2 - Prove that the statements in Exercises are true...Ch. 2.2 - Prove that the statements in Exercises are true...Ch. 2.2 - Prove that the statements in Exercises are true...Ch. 2.2 - Prove that the statements in Exercises are true...Ch. 2.2 - Prove that the statements in Exercises 116 are...Ch. 2.2 - Prove that the statements in Exercises are true...Ch. 2.2 - Prove that the statements in Exercises 116 are...Ch. 2.2 - 17. Use mathematical induction to prove that the...Ch. 2.2 - Let be integers, and let be positive integers....Ch. 2.2 - Let xandy be integers, and let mandn be positive...Ch. 2.2 - Let xandy be integers, and let mandn be positive...Ch. 2.2 - Let x and y be integers, and let m and n be...Ch. 2.2 - Let x and y be integers, and let m and n be...Ch. 2.2 - Let and be integers, and let and be positive...Ch. 2.2 - If be a set of integers closed under subtraction...Ch. 2.2 - Let and be a real number, and let be integers...Ch. 2.2 - Use Exercise 25 and generalized induction to prove...Ch. 2.2 - Use the equation (nr1)+(nr)=(n+1r) for 1rn. And...Ch. 2.2 - Use the equation. (nr1)+(nr)=(n+1r) for 1rn....Ch. 2.2 - If and are matrices in, Part of theorem ...Ch. 2.2 - If and are matrices in, Part of theorem ...Ch. 2.2 - If and are matrices in, Part of theorem ...Ch. 2.2 - In Exercise use mathematical induction to prove...Ch. 2.2 - In Exercise 3236 use mathematical induction to...Ch. 2.2 - In Exercise 3236 use mathematical induction to...Ch. 2.2 - In Exercise 3236 use mathematical induction to...Ch. 2.2 - In Exercise 3236 use mathematical induction to...Ch. 2.2 - In Exercise 3739, use generalized induction on n...Ch. 2.2 - In Exercise , use generalized induction on to...Ch. 2.2 - In Exercise 3739, use generalized induction on n...Ch. 2.2 - Exercise can be generalized as follows: If and...Ch. 2.2 - In Exercise , use generalized induction to prove...Ch. 2.2 - In Exercise , use generalized induction to prove...Ch. 2.2 - In Exercise , use generalized induction to prove...Ch. 2.2 - In Exercise , use generalized induction to prove...Ch. 2.2 - In Exercise 4145, use generalized induction to...Ch. 2.2 - Use generalized induction and Exercise 43 to prove...Ch. 2.2 - Use generalized induction and Exercise 43 to prove...Ch. 2.2 - Assume the statement from Exercise 30 in section...Ch. 2.2 - Show that if the statement is assumed to be true...Ch. 2.2 - Show that if the statement 1+2+3+...+n=n(n+1)2+2...Ch. 2.2 - Given the recursively defined sequence a1=1,a2=4,...Ch. 2.2 - Given the recursively defined sequence...Ch. 2.2 - Given the recursively defined sequence a1=0,a2=30,...Ch. 2.2 - Given the recursively defined sequence , and , use...Ch. 2.2 - The Fibonacci sequence fn=1,1,2,3,5,8,13,21,... is...Ch. 2.2 - Let f1,f2,...,fn be permutations on a nonempty set...Ch. 2.2 - Define powers of a permutation on by the...Ch. 2.3 - Label each of the following statements as either...Ch. 2.3 - Label each of the following statement as either...Ch. 2.3 - Label each of the following statement as either...Ch. 2.3 - Label each of the following statement as either...Ch. 2.3 - Label each of the following statement as either...Ch. 2.3 - Label each of the following statement as either...Ch. 2.3 - Label each of the following statement as either...Ch. 2.3 - Label each of the following statement as either...Ch. 2.3 - Label each of the following statement as either...Ch. 2.3 - Label each of the following statement as either...Ch. 2.3 - List all divisors of the following integers. ...Ch. 2.3 - 2. List all common divisors of each of the...Ch. 2.3 - Write and as given in Exercises, find the q and...Ch. 2.3 - Write a and b as given in Exercises 316, find the...Ch. 2.3 - Write and as given in Exercises, find the q and...Ch. 2.3 - Write a and b as given in Exercises 316, find the...Ch. 2.3 - Write and as given in Exercises, find the and...Ch. 2.3 - Write and as given in Exercises, find the and ...Ch. 2.3 - Write and as given in Exercises, find the and ...Ch. 2.3 - Write a and b as given in Exercises 316, find the...Ch. 2.3 - Write a and b as given in Exercises 316, find the...Ch. 2.3 - Write and as given in Exercises, find the and ...Ch. 2.3 - Write and as given in Exercises, find the and ...Ch. 2.3 - Write and as given in Exercises, find the and ...Ch. 2.3 - Write and as given in Exercises, find the and...Ch. 2.3 - Write a and b as given in Exercises 316, find the...Ch. 2.3 - 17. If a,b and c are integers such that ab and ac,...Ch. 2.3 - Let R be the relation defined on the set of...Ch. 2.3 - 19. If and are integers with and . Prove that...Ch. 2.3 - Let a,b,c and d be integers such that ab and cd....Ch. 2.3 - Prove that if and are integers such that and ,...Ch. 2.3 - Prove that if and are integers such that and ,...Ch. 2.3 - Let a and b be integers such that ab and ba. Prove...Ch. 2.3 - Let , and be integers . Prove or disprove that ...Ch. 2.3 - Let ,, and be integers. Prove or disprove that ...Ch. 2.3 - 26. Let be an integer. Prove that . (Hint:...Ch. 2.3 - Let a be an integer. Prove that 3|a(a+1)(a+2)....Ch. 2.3 - Let a be an odd integer. Prove that 8|(a21).Ch. 2.3 - Let be an arbitrary integer. Prove that there is...Ch. 2.3 - Let be as described in the proof of Theorem. Give...Ch. 2.3 - Let and be integers with and with . Use this...Ch. 2.3 - Use the Division Algorithm to prove that if andare...Ch. 2.3 - Prove that the Well-Ordering Theorem implies the...Ch. 2.3 - Assume that the Well-Ordering Theorem holds, and...Ch. 2.3 - In Exercises, use mathematical induction to prove...Ch. 2.3 - In Exercises, use mathematical induction to prove...Ch. 2.3 - In Exercises, use mathematical induction to prove...Ch. 2.3 - In Exercises, use mathematical induction to prove...Ch. 2.3 - In Exercises 3548, use mathematical induction to...Ch. 2.3 - In Exercises, use mathematical induction to prove...Ch. 2.3 - In Exercises, use mathematical induction to prove...Ch. 2.3 - In Exercises, use mathematical induction to prove...Ch. 2.3 - In Exercises 3548, use mathematical induction to...Ch. 2.3 - In Exercises 3548, use mathematical induction to...Ch. 2.3 - In Exercises, use mathematical induction to prove...Ch. 2.3 - In Exercises, use mathematical induction to prove...Ch. 2.3 - For all a and b in , ab is a factor of an-bn....Ch. 2.3 - For all a and b in , a+b is a factor of a2n-b2n.Ch. 2.3 - 49. a. The binomial coefficients are defined in...Ch. 2.4 - True or false Label each of the following...Ch. 2.4 - True or false Label each of the following...Ch. 2.4 - True or false Label each of the following...Ch. 2.4 - True or false Label each of the following...Ch. 2.4 - True or false Label each of the following...Ch. 2.4 - True or false Label each of the following...Ch. 2.4 - True or false Label each of the following...Ch. 2.4 - True or false Label each of the following...Ch. 2.4 - True or false Label each of the following...Ch. 2.4 - True or false Label each of the following...Ch. 2.4 - True or false Label each of the following...Ch. 2.4 - True or false Label each of the following...Ch. 2.4 - True or false Label each of the following...Ch. 2.4 - List all the primes lessthan 100.Ch. 2.4 - For each of the following pairs, write andin...Ch. 2.4 - In each part, find the greatest common divisor...Ch. 2.4 - Find the smallest integer in the given set. { and ...Ch. 2.4 - Prove that if p and q are distinct primes, then...Ch. 2.4 - Show that n2n+5 is a prime integer when n=1,2,3,4...Ch. 2.4 - If a0 and ab, then prove or disprove that (a,b)=a.Ch. 2.4 - If , prove . Ch. 2.4 - Let , and be integers such that . Prove that if ,...Ch. 2.4 - Let be a nonzero integer and a positive integer....Ch. 2.4 - Let ac and bc, and (a,b)=1, prove that ab divides...Ch. 2.4 - Prove that if , , and , then . Ch. 2.4 - Let and . Prove or disprove that . Ch. 2.4 - If b0 and a=bq+r, prove that (a,b)=(b,r).Ch. 2.4 - Let r0=b0. With the notation used in the...Ch. 2.4 - Prove that every remainder in the Euclidean...Ch. 2.4 - Let and be integers, at least one of them not ....Ch. 2.4 - Prove Corollary 2.17: If p is a prime and...Ch. 2.4 - Prove that if n is a positive integer greater than...Ch. 2.4 - Prove that (ab,c)=1 if and only if (a,c)=1 and...Ch. 2.4 - Let (a,b)=1 and (a,c)=1. Prove or disprove that...Ch. 2.4 - Let (a,b)=1. Prove (a,bc)=(a,c), where c is any...Ch. 2.4 - Let (a,b)=1. Prove (a2,b2)=1.Ch. 2.4 - Let (a,b)=1. Prove that (a,bn)=1 for all positive...Ch. 2.4 - Prove that if m0 and (a,b) exists, then...Ch. 2.4 - Prove that if d=(a,b), a=a0d, and b=b0d, then...Ch. 2.4 - Prove that the least common multiple of two...Ch. 2.4 - Let and be positive integers. If and is the...Ch. 2.4 - Let and be positive integers. Prove that if , ,...Ch. 2.4 - Let , and be three nonzero integers. Use...Ch. 2.4 - Find the greatest common divisor of a,b, and c and...Ch. 2.4 - Use the second principle of Finite Induction to...Ch. 2.4 - Use the fact that 3 is a prime to prove that there...Ch. 2.4 - Let be prime. Prove that is not a rational...Ch. 2.4 - Prove that 23 is not a rational number.Ch. 2.5 - True or False Label each of the following...Ch. 2.5 - True or False Label each of the following...Ch. 2.5 - Label each of the following statements as either...Ch. 2.5 - Label each of the following statements as either...Ch. 2.5 - Label each of the following statements as either...Ch. 2.5 - Label each of the following statements as either...Ch. 2.5 - Label each of the following statements as either...Ch. 2.5 - In this exercise set, all variables are...Ch. 2.5 - In this exercise set, all variables are...Ch. 2.5 - Find a solution , , for each of the congruences ...Ch. 2.5 - Find a solution , , for each of the congruences ...Ch. 2.5 - Find a solution x, 0xn, for each of the...Ch. 2.5 - Find a solution x, 0xn, for each of the...Ch. 2.5 - Find a solution x, 0xn, for each of the...Ch. 2.5 - Find a solution x, 0xn, for each of the...Ch. 2.5 - Find a solution , , for each of the congruences ...Ch. 2.5 - Find a solution , , for each of the congruences ...Ch. 2.5 - Find a solution , , for each of the congruences ...Ch. 2.5 - Find a solution , , for each of the congruences ...Ch. 2.5 - Find a solution x, 0xn, for each of the...Ch. 2.5 - Find a solution , , for each of the congruences ...Ch. 2.5 - Find a solution x, 0xn, for each of the...Ch. 2.5 - Find a solution , , for each of the congruences ...Ch. 2.5 - Find a solution x, 0xn, for each of the...Ch. 2.5 - Find a solution x, 0xn, for each of the...Ch. 2.5 - Find a solution x, 0xn, for each of the...Ch. 2.5 - Find a solution x, 0xn, for each of the...Ch. 2.5 - Find a solution , , for each of the congruences ...Ch. 2.5 - Find a solution , , for each of the congruences ...Ch. 2.5 - Find a solution , , for each of the congruences ...Ch. 2.5 - Find a solution , , for each of the congruences ...Ch. 2.5 - 25. Complete the proof of Theorem : If and is...Ch. 2.5 - Complete the proof of Theorem 2.24: If ab(modn)...Ch. 2.5 - Prove that if a+xa+y(modn), then xy(modn).Ch. 2.5 - 28. If and where , prove that . Ch. 2.5 - 29. Find the least positive integer that is...Ch. 2.5 - 30. Prove that any positive integer is congruent...Ch. 2.5 - 31. If , prove that for every positive integer . Ch. 2.5 - 32. Prove that if is an integer, then either or...Ch. 2.5 - Prove or disprove that if n is odd, then...Ch. 2.5 - If m is an integer, show that m2 is congruent...Ch. 2.5 - 35. Prove that for every positive integer. Ch. 2.5 - 36. Let and be integers. Prove that if there is an...Ch. 2.5 - 37. Prove that if is a prime and, then has a...Ch. 2.5 - Let d=(a,n) where n1. Prove that if there is a...Ch. 2.5 - 39. (See Exercise 38.) Suppose that and that is a...Ch. 2.5 - In the congruences axb(modn) in Exercises 4053, a...Ch. 2.5 - In the congruences in Exercises, and may not be...Ch. 2.5 - In the congruences in Exercises, and may not be...Ch. 2.5 - In the congruences axb(modn) in Exercises 4053, a...Ch. 2.5 - In the congruences in Exercises, and may not be...Ch. 2.5 - In the congruences axb(modn) in Exercises 4053, a...Ch. 2.5 - In the congruences in Exercises, and may not be...Ch. 2.5 - In the congruences axb(modn) in Exercises 4053, a...Ch. 2.5 - In the congruences in Exercises, and may not be...Ch. 2.5 - In the congruences in Exercises, and may not be...Ch. 2.5 - In the congruences in Exercises, and may not be...Ch. 2.5 - In the congruences ax b (mod n) in Exercises...Ch. 2.5 - In the congruences axb(modn) in Exercises 4053, a...Ch. 2.5 - In the congruences axb(modn) in Exercises 4053, a...Ch. 2.5 - 54. Let be a prime integer. Prove Fermat's Little...Ch. 2.5 - 55. Prove the Chinese Remainder Theorem: Let , , ....Ch. 2.5 - 56. Solve the following systems of congruences. ...Ch. 2.5 - a. Prove that 10n1(mod9) for every positive...Ch. 2.5 - a. Prove that 10n(1)n(mod11) for every positive...Ch. 2.6 - Label each of the following statements as either...Ch. 2.6 - True or False Label each of the following...Ch. 2.6 - True or False Label each of the following...Ch. 2.6 - True or False Label each of the following...Ch. 2.6 - True or False Label each of the following...Ch. 2.6 - Label each of the following statements as either...Ch. 2.6 - Label each of the following statements as either...Ch. 2.6 - Label each of the following statements as either...Ch. 2.6 - Perform the following computations in 12.Ch. 2.6 - a. Verify that [ 1 ][ 2 ][ 3 ][ 4 ]=[ 4 ] in 5. b....Ch. 2.6 - Make addition tables for each of the following....Ch. 2.6 - Make multiplication tables for each of the...Ch. 2.6 - Find the multiplicative inverse of each given...Ch. 2.6 - For each of the following, list all the elements...Ch. 2.6 - Find all zero divisors in each of the following n....Ch. 2.6 - Whenever possible, find a solution for each of the...Ch. 2.6 - Let [ a ] be an element of n that has a...Ch. 2.6 - Solve each of the following equations by finding [...Ch. 2.6 - In Exercise, Solve the systems of equations in. ...Ch. 2.6 - In Exercise, Solve the systems of equations...Ch. 2.6 - In Exercise 1114, Solve the systems of equations...Ch. 2.6 - In Exercise 1114, Solve the systems of equations...Ch. 2.6 - Prove Theorem. Theorem 2.30 Multiplication...Ch. 2.6 - Prove the following distributive property in : ...Ch. 2.6 - Prove the following equality in n: ([ a ]+[ b ])([...Ch. 2.6 - Let p be a prime integer. Prove that if [ a ][ b...Ch. 2.6 - Use the results in Exercises and find all...Ch. 2.6 - a. Let [ a ]n. Use mathematical induction to prove...Ch. 2.6 - Use the results of Exercises to simplify each of...Ch. 2.6 - Let be a prime integer. Prove that are the only...Ch. 2.6 - Show that if n is not a prime, then there exist [...Ch. 2.6 - Let p be a prime integer. Prove the following...Ch. 2.6 - Show that if is not a prime, the cancellation law...Ch. 2.6 - Prove that a nonzero element in is a zero divisor...Ch. 2.7 - True or False Label each of the following...Ch. 2.7 - Label each of the following statement as either...Ch. 2.7 - Label each of the following statement as either...Ch. 2.7 - True or false Label each of the following...Ch. 2.7 - Suppose 4- bit words abcd are mapped onto 5- bit...Ch. 2.7 - 2. Suppose - bit words are mapped onto - bit code...Ch. 2.7 - 3. Use maximum likelihood decoding to correct the...Ch. 2.7 - Suppose 2-bit words ab are mapped onto 5-bit code...Ch. 2.7 - Suppose a codding scheme is devised that maps -bit...Ch. 2.7 - Suppose the probability of erroneously...Ch. 2.7 - Suppose the probability of erroneously...Ch. 2.7 - Suppose the probability of incorrectly...Ch. 2.7 - Compute the check digit for the eight-digit...Ch. 2.7 - Is the identification number 11257402 correct if...Ch. 2.7 - Show that the check digit in bank identification...Ch. 2.7 - Suppose that the check digit is computed as...Ch. 2.7 - Verify that transposition errors of adjacent...Ch. 2.7 - Compute the check digit for the UPC symbols whose...Ch. 2.7 - Verify that the check digit in a UPC symbol...Ch. 2.7 - Show that the transposition errors of the...Ch. 2.7 - Passports contain identification codes of the...Ch. 2.7 - ISBNs are -digit numbers that identify books,...Ch. 2.7 - In the ISBN scheme, write the check digit in the...Ch. 2.7 - Suppose and are -bit words. The Hamming distance ...Ch. 2.7 - Let x,y,andz be k-bit words. Prove the following...Ch. 2.7 - wt(x) The Hamming weight of k-bit word is defined...Ch. 2.7 - The minimum distance of a code is defined to be...Ch. 2.7 - Repeat Exercise for the code consisting of the...Ch. 2.7 - Repeat Exercise 23 for the code consisting of the...Ch. 2.7 - Write out the eight code words in the code where...Ch. 2.8 - Label each of the following statements as either...Ch. 2.8 - Label each of the following statements as either...Ch. 2.8 - Label each of the following statements as either...Ch. 2.8 - In the -letter alphabet A described in Example,...Ch. 2.8 - Suppose the alphabet consists of through, in...Ch. 2.8 - In the -letter alphabet as in Exercise , use the...Ch. 2.8 - In the 27-letter alphabet A described in Example...Ch. 2.8 - In the -letter alphabet described in Example, use...Ch. 2.8 - In the -letter alphabet described in Exercise, use...Ch. 2.8 - Suppose the alphabet consists of a through z, in...Ch. 2.8 - Use the alphabet C from the preceding problem and...Ch. 2.8 - Suppose that in a long ciphertext message the...Ch. 2.8 - Suppose that in a long ciphertext message the...Ch. 2.8 - Suppose the alphabet consists of a through z, in...Ch. 2.8 - Suppose the alphabet consists of a through, in...Ch. 2.8 - Let be defined by mod. Show that exists if , and...Ch. 2.8 - Suppose we encipher a plaintext message M using...Ch. 2.8 - a. Excluding the identity cipher, how many...Ch. 2.8 - Rework Example 5 by breaking the message into...Ch. 2.8 - Suppose that in an RSA Public Key Cryptosystem,...Ch. 2.8 - Suppose that in an RSA Public Key Cryptosystem,...Ch. 2.8 - Suppose that in an RSA Public Key Cryptosystem....Ch. 2.8 - Suppose that in an RSA Public Key Cryptosystem....Ch. 2.8 - Suppose that in an RSA Public Key Cryptosystem,...Ch. 2.8 - Suppose that in an RSA Public Key Cryptosystem,...Ch. 2.8 - The Euler phi-function is defined for positive...Ch. 2.8 - Prove that the number of ordered pairs a,b that...Ch. 2.8 - Evaluate each of the following. (23) (25) (3.5)...Ch. 2.8 - Evaluate each of the following. (2) (22) (23) (24)...

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