Finite Mathematics for Business, Economics, Life Sciences and Social Sciences
14th Edition
ISBN: 9780134677972
Author: Barnett
Publisher: PEARSON
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Chapter 4.1, Problem 54E
In Problems
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7.
Define the sequence {b} by
bo = 0
Ել ։
= 2
8.
bn=4bn-1-4bn-2 for n ≥ 2
(a) Give the first five terms of this sequence.
(b) Prove: For all n = N, bn = 2nn.
Let a Rsuch that a 1, and let nЄ N. We're going to derive a formula for
Σoa without needing to prove it by induction. Tip: it can be helpful to use C1+C2+...+Cn
notation instead of summation notation when working this out on scratch paper.
(a) Take a a² and manipulate it until it is in the form Σ.a.
i=0
(b) Using this, calculate the difference between a Σ0 a² and Σ0 a², simplifying away the
summation notation.
i=0
(c) Now that you know what (a – 1) Σ0 a² equals, divide both sides by a − 1 to derive the
formula for
a².
(d) (Optional, just for induction practice) Prove this formula using induction.
3.
Let A, B, and C be sets and let f: A B and g BC be functions. For
each of the following, draw arrow diagrams that illustrate the situation, and then prove the
proposition.
(a) If ƒ and g are injective, then go f is injective.
(b) If ƒ and g are surjective, then go f is surjective.
(c) If gof is injective then f is injective. Make sure your arrow diagram shows that 9 does
not need to be injective!
(d) If gof is surjective then g is surjective. Make sure your arrow diagram shows that f
does not need to be surjective!
4.
5.
6.
Let X be a set and let f: XX be a function. We say that f is an involution if
fof idx and that f is idempotent if f f = f.
(a) If f is an involution, must it be invertible? Why or why not?2
(b) If f is idempotent, must it be invertible? Why or why not?
(c) If f is idempotent and x E range(f), prove that f(x) = x.
Prove that [log3 536] 5. You proof must be verifiable by someone who does not
have access to a scientific calculator or a logarithm table (you cannot use log3 536≈ 5.7).
Define the sequence {a} by a = 2-i for i≥ 1.
(a) Give the first five terms of the sequence.
(b) Prove that the sequence is increasing.
Chapter 4 Solutions
Finite Mathematics for Business, Economics, Life Sciences and Social Sciences
Ch. 4.1 - Can a consistent and dependent system have exactly...Ch. 4.1 - Return to Example 2 and solve each system by...Ch. 4.1 - Solve by graphing and check: 2xy=3x+2y=4Ch. 4.1 - Solve each of the following systems by graphing:...Ch. 4.1 - Solve to two decimal places using graphical...Ch. 4.1 - Solve by substitution: 3x3y=22xy=6Ch. 4.1 - Solve the following system using elimination by...Ch. 4.1 - Dennis wants to use cottage cheese and yogurt to...Ch. 4.1 - Find the equilibrium quantity and equilibrium...Ch. 4.1 - In Problems 1-6, find the x and y coordinates of...
Ch. 4.1 - In Problems 1-6, find the x and y coordinates of...Ch. 4.1 - In Problems 1-6, find the x and y coordinates of...Ch. 4.1 - In Problems 1-6, find the x and y coordinates of...Ch. 4.1 - In Problems 1-6, find the x and y coordinates of...Ch. 4.1 - In Problems 1-6, find the x and y coordinates of...Ch. 4.1 - In Problems 7 and 8, find an equation in...Ch. 4.1 - In Problems 7 and 8, find an equation in...Ch. 4.1 - Match each system in Problems 9-12 with one of the...Ch. 4.1 - Match each system in Problems 9-12 with one of the...Ch. 4.1 - Match each system in Problems 9-12 with one of the...Ch. 4.1 - Match each system in Problems 9-12 with one of the...Ch. 4.1 - Solve Problem 13-16 by graphing. 3xy=2x+2y=10Ch. 4.1 - Solve Problem 13-16 by graphing. 3x2y=127x+2y=8Ch. 4.1 - Solve Problem 13-16 by graphing. m+2n=42m+4n=8Ch. 4.1 - Solve Problem 13-16 by graphing. 3u+5v=156u+10v=30Ch. 4.1 - Solve Problems 17-20 using substitution....Ch. 4.1 - Solve Problems 17-20 using substitution....Ch. 4.1 - Solve Problems 17-20 using substitution....Ch. 4.1 - Solve Problems 17-20 using substitution....Ch. 4.1 - Solve Problems 21-24 using elimination by...Ch. 4.1 - Solve Problems 21-24 using elimination by...Ch. 4.1 - Solve Problems 21-24 using elimination by...Ch. 4.1 - Solve Problems 21-24 using elimination by...Ch. 4.1 - Solve Problems 25-34 using substitution or...Ch. 4.1 - Solve Problems 25-34 using substitution or...Ch. 4.1 - Solve Problems 25-34 using substitution or...Ch. 4.1 - Prob. 28ECh. 4.1 - Solve Problems 25-34 using substitution or...Ch. 4.1 - Solve Problems 25-34 using substitution or...Ch. 4.1 - Solve Problems 25-34 using substitution or...Ch. 4.1 - Solve Problems 25-34 using substitution or...Ch. 4.1 - Solve Problems 25-34 using substitution or...Ch. 4.1 - Solve Problems 25-34 using substitution or...Ch. 4.1 - In Problems 35-42, solve the system. Note that...Ch. 4.1 - In Problems 35-42, solve the system. Note that...Ch. 4.1 - In Problems 35-42, solve the system. Note that...Ch. 4.1 - In Problems 35-42, solve the system. Note that...Ch. 4.1 - In Problems 35-42, solve the system. Note that...Ch. 4.1 - In Problems 35-42, solve the system. Note that...Ch. 4.1 - In Problems 35-42, solve the system. Note that...Ch. 4.1 - In Problems 35-42, solve the system. Note that...Ch. 4.1 - In a free competitive market, if the supply of a...Ch. 4.1 - In a free competitive market, if the demand for a...Ch. 4.1 - Problems 45-48 are concerned with the linear...Ch. 4.1 - Problems 45-48 are concerned with the linear...Ch. 4.1 - Problems 45-48 are concerned with the linear...Ch. 4.1 - Problems 45-48 are concerned with the linear...Ch. 4.1 - In Problems 49-56, use a graphing calculator to...Ch. 4.1 - In Problems 49-56, use a graphing calculator to...Ch. 4.1 - In Problems 49-56, use a graphing calculator to...Ch. 4.1 - In Problems 49-56, use a graphing calculator to...Ch. 4.1 - In Problems 49-56, use a graphing calculator to...Ch. 4.1 - In Problems 49-56, use a graphing calculator to...Ch. 4.1 - In Problems 49-56, use a graphing calculator to...Ch. 4.1 - In Problems 49-56, use a graphing calculator to...Ch. 4.1 - In Problems 57-62, graph the equations in the same...Ch. 4.1 - In Problems 57-62, graph the equations in the same...Ch. 4.1 - In Problems 57-62, graph the equations in the same...Ch. 4.1 - In Problems 57-62, graph the equations in the same...Ch. 4.1 - In Problems 57-62, graph the equations in the same...Ch. 4.1 - In Problems 57-62, graph the equations in the same...Ch. 4.1 - The coefficients of the three systems given below...Ch. 4.1 - Repeat Problem 63 for the following systems:...Ch. 4.1 - Supply and demand for T-shirts. Suppose that the...Ch. 4.1 - Supply and demand for baseball caps. Suppose that...Ch. 4.1 - Supply and demand for soybeans. At $4.80 per...Ch. 4.1 - Supply and demand for corn. At $2.13 per bushel,...Ch. 4.1 - Break-even analysis. A small plant manufactures...Ch. 4.1 - Break-even analysis. Repeat Problem 69 with the...Ch. 4.1 - Break-even analysis. A company markets exercise...Ch. 4.1 - Break-even analysis. Repeat Problem 71 if the...Ch. 4.1 - Delivery charges. United Express, a national...Ch. 4.1 - Delivery charges. Refer to Problem 73. Federated...Ch. 4.1 - Coffee blends. A coffee company uses Colombian and...Ch. 4.1 - Coffee blends. Refer to Problem 75. (A) If the...Ch. 4.1 - Animal diet. Animals in an experiment are to be...Ch. 4.1 - Fertilizer. A fruit grower uses two types of...Ch. 4.1 - Electronics. A supplier for the electronics...Ch. 4.1 - Sausage. A company produces Italian sausages and...Ch. 4.1 - Physics. An object dropped off the top of a tall...Ch. 4.1 - Physics. Repeat Problem 81 if the object is 240...Ch. 4.1 - Earthquakes. An earthquake emits a primary wave...Ch. 4.1 - Sound waves. A ship using sound-sensing devices...Ch. 4.1 - Psychology. People approach certain situations...Ch. 4.2 - The summary following the solution of Example 1...Ch. 4.2 - The solution of Example 3 involved three augmented...Ch. 4.2 - Solve using augmented matrix methods: 2x1x2=7Ch. 4.2 - Solve using augmented matrix methods:...Ch. 4.2 - Solve using augmented matrix methods:...Ch. 4.2 - Solve using augmented matrix methods:...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - Problems 1-14 refer to the following matrices: (If...Ch. 4.2 - In Problems 15-18, write the coefficient matrix...Ch. 4.2 - In Problems 15-18, write the coefficient matrix...Ch. 4.2 - In Problems 15-18, write the coefficient matrix...Ch. 4.2 - In Problems 15-18, write the coefficient matrix...Ch. 4.2 - In Problems 19-22, write the system of linear...Ch. 4.2 - In Problems 19-22, write the system of linear...Ch. 4.2 - In Problems 19-22, write the system of linear...Ch. 4.2 - In Problems 19-22, write the system of linear...Ch. 4.2 - Perform the row operations indicated in Problems...Ch. 4.2 - Perform the row operations indicated in Problems...Ch. 4.2 - Perform the row operations indicated in Problems...Ch. 4.2 - Perform the row operations indicated in Problems...Ch. 4.2 - Perform the row operations indicated in Problems...Ch. 4.2 - Perform the row operations indicated in Problems...Ch. 4.2 - Perform the row operations indicated in Problems...Ch. 4.2 - Perform the row operations indicated in Problems...Ch. 4.2 - Perform the row operations indicated in Problems...Ch. 4.2 - Perform the row operations indicated in Problems...Ch. 4.2 - Perform the row operations indicated in Problems...Ch. 4.2 - Perform the row operations indicated in Problems...Ch. 4.2 - Each of the matrices in Problems 35-42 is the...Ch. 4.2 - Each of the matrices in Problems 35-42 is the...Ch. 4.2 - Each of the matrices in Problems 35-42 is the...Ch. 4.2 - Each of the matrices in Problems 35-42 is the...Ch. 4.2 - Each of the matrices in Problems 35-42 is the...Ch. 4.2 - Each of the matrices in Problems 35-42 is the...Ch. 4.2 - Each of the matrices in Problems 35-42 is the...Ch. 4.2 - Each of the matrices in Problems 35-42 is the...Ch. 4.2 - Solve Problems 43-46 using augmented matrix...Ch. 4.2 - Solve Problems 43-46 using augmented matrix...Ch. 4.2 - Solve Problems 43-46 using augmented matrix...Ch. 4.2 - Solve Problems 43-46 using augmented matrix...Ch. 4.2 - Solve Problems 47 and 48 using augmented matrix...Ch. 4.2 - Solve Problems 47 and 48 using augmented matrix...Ch. 4.2 - Each of the matrices in Problems 49-54 is the...Ch. 4.2 - Each of the matrices in Problems 49-54 is the...Ch. 4.2 - Each of the matrices in Problems 49-54 is the...Ch. 4.2 - Each of the matrices in Problems 49-54 is the...Ch. 4.2 - Each of the matrices in Problems 49-54 is the...Ch. 4.2 - Each of the matrices in Problems 49-54 is the...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 55-74 using augmented matrix...Ch. 4.2 - Solve Problems 75-80 using augmented matrix...Ch. 4.2 - Solve Problems 75-80 using augmented matrix...Ch. 4.2 - Solve Problems 75-80 using augmented matrix...Ch. 4.2 - Solve Problems 75-80 using augmented matrix...Ch. 4.2 - Solve Problems 75-80 using augmented matrix...Ch. 4.2 - Solve Problems 75-80 using augmented matrix...Ch. 4.2 - Solve Problems 81-84 using augmented matrix...Ch. 4.2 - Solve Problems 81-84 using augmented matrix...Ch. 4.2 - Solve Problems 81-84 using augmented matrix...Ch. 4.2 - Solve Problems 81-84 using augmented matrix...Ch. 4.3 - Explain why the definition of reduced form ensures...Ch. 4.3 - Refer to Example 6. The rental company charges...Ch. 4.3 - The matrices below are not in reduced form....Ch. 4.3 - Solve by Gauss-Jordan elimination:...Ch. 4.3 - Solve by Gauss-Jordan elimination:...Ch. 4.3 - Solve by Gauss-Jordan elimination:...Ch. 4.3 - Solve by Gauss-Jordan elimination:...Ch. 4.3 - A company that rents small moving trucks wants to...Ch. 4.3 - In Problems 1-4, write the augmented matrix of the...Ch. 4.3 - In Problems 1-4, write the augmented matrix of the...Ch. 4.3 - In Problems 1-4, write the augmented matrix of the...Ch. 4.3 - In Problems 14, write the augmented matrix of the...Ch. 4.3 - In Problems 5-8, write the system of linear...Ch. 4.3 - In Problems 5-8, write the system of linear...Ch. 4.3 - In Problems 5-8, write the system of linear...Ch. 4.3 - In Problems 5-8, write the system of linear...Ch. 4.3 - In Problems 9-18, if a matrix is in reduced form,...Ch. 4.3 - In Problems 9-18, if a matrix is in reduced form,...Ch. 4.3 - In Problems 9-18, if a matrix is in reduced form,...Ch. 4.3 - In Problems 9-18, if a matrix is in reduced form,...Ch. 4.3 - In Problems 9-18, if a matrix is in reduced form,...Ch. 4.3 - In Problems 9-18, if a matrix is in reduced form,...Ch. 4.3 - In Problems 9-18, if a matrix is in reduced form,...Ch. 4.3 - In Problems 9-18, if a matrix is in reduced form,...Ch. 4.3 - In Problems 9-18, if a matrix is in reduced form,...Ch. 4.3 - In Problems 9-18, if a matrix is in reduced form,...Ch. 4.3 - In Problems 19-28, write the solution of the...Ch. 4.3 - In Problems 19-28, write the solution of the...Ch. 4.3 - In Problems 19-28, write the solution of the...Ch. 4.3 - In Problems 19-28, write the solution of the...Ch. 4.3 - In Problems 19-28, write the solution of the...Ch. 4.3 - In Problems 19-28, write the solution of the...Ch. 4.3 - In Problems 19-28, write the solution of the...Ch. 4.3 - In Problems 19-28, write the solution of the...Ch. 4.3 - In Problems 19-28, write the solution of the...Ch. 4.3 - In Problems 19-28, write the solution of the...Ch. 4.3 - In which of Problems 19,21,23,25and27 is the...Ch. 4.3 - In which of Problems 20,22,24,26and28 is the...Ch. 4.3 - In which of Problems 19,21,23,25and27 is the...Ch. 4.3 - In which of Problems 20,22,24,26and28 is the...Ch. 4.3 - In Problems 33-38, discuss the validity of each...Ch. 4.3 - In Problems 33-38, discuss the validity of each...Ch. 4.3 - In Problems 33-38, discuss the validity of each...Ch. 4.3 - In Problems 33-38, discuss the validity of each...Ch. 4.3 - In Problems 33-38, discuss the validity of each...Ch. 4.3 - In Problems 33-38, discuss the validity of each...Ch. 4.3 - Use row operations to change each matrix in...Ch. 4.3 - Use row operations to change each matrix in...Ch. 4.3 - Use row operations to change each matrix in...Ch. 4.3 - Use row operations to change each matrix in...Ch. 4.3 - Use row operations to change each matrix in...Ch. 4.3 - Use row operations to change each matrix in...Ch. 4.3 - Use row operations to change each matrix in...Ch. 4.3 - Use row operations to change each matrix in...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 4762 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Solve Problems 47-62 using Gauss-Jordan...Ch. 4.3 - Consider a consistent system of three linear...Ch. 4.3 - Consider a system of three linear equations in...Ch. 4.3 - Solve Problems 65-70 using Gauss-Jordan...Ch. 4.3 - Solve Problems 65-70 using Gauss-Jordan...Ch. 4.3 - Solve Problems 65-70 using Gauss-Jordan...Ch. 4.3 - Solve Problems 65-70 using Gauss-Jordan...Ch. 4.3 - Solve Problems 65-70 using Gauss-Jordan...Ch. 4.3 - Solve Problems 65-70 using Gauss-Jordan...Ch. 4.3 - Find a,bandc so that the graph of the quadratic...Ch. 4.3 - Find a,b,andc so that the graph of the quadratic...Ch. 4.3 - Boat production. A small manufacturing plant makes...Ch. 4.3 - Production scheduling. Repeat Problem 73 assuming...Ch. 4.3 - Tank car leases. A chemical manufacturer wants to...Ch. 4.3 - Airplane leases. A corporation wants to lease a...Ch. 4.3 - Tank car leases. Refer to Problem 75. The cost of...Ch. 4.3 - Airplane leases. Refer to Problem 76. The cost of...Ch. 4.3 - Income tax. A corporation has a taxable income of...Ch. 4.3 - Income tax. Repeat Problem 79 if local taxes are...Ch. 4.3 - Taxable income. As a result of several mergers and...Ch. 4.3 - Taxable income. Repeat Problem 81 if tax law is...Ch. 4.3 - Nutrition. A dietitian in a hospital is to arrange...Ch. 4.3 - Nutrition. Repeat Problem 83 if the diet is to...Ch. 4.3 - Plant food. A farmer can buy four types of plant...Ch. 4.3 - Animal feed. In a laboratory experiment, rats are...Ch. 4.3 - Plant food. Refer to Problem 85. The costs of the...Ch. 4.3 - Animal feed. Refer to Problem 86.The costs of the...Ch. 4.3 - Population growth. The U.S. population was...Ch. 4.3 - Population growth. The population of California...Ch. 4.3 - Female life expectancy. The life expectancy for...Ch. 4.3 - Male life expectancy. The life expectancy for...Ch. 4.3 - Female life expectancy. Refer to Problem 91....Ch. 4.3 - Male life expectancy. Refer to Problem 92....Ch. 4.3 - Sociology. Two sociologists have grant money to...Ch. 4.3 - Sociology. Repeat Problem 95 if 650 telephone...Ch. 4.3 - Traffic Wow. The rush-hour traffic flow for a...Ch. 4.3 - Traffic flow. Refer to Problem 97. Closing...Ch. 4.4 - In addition to the commutative and zero...Ch. 4.4 - Add: 321013+231212Ch. 4.4 - Subtract: 235321Ch. 4.4 - Find a,b,c,andd so that abcd4213=2582Ch. 4.4 - Find: 101.30.23.5Ch. 4.4 - Repeat Example 5 with...Ch. 4.4 - 10322341=?Ch. 4.4 - If the factory in Example 7 also produces a trick...Ch. 4.4 - Find each product, if it is defined:...Ch. 4.4 - Find a,b,c, and d so that 6053acbd=1624646Ch. 4.4 - Refer to Example 10. The company wants to know how...Ch. 4.4 - In Problems 1-14, perform the indicated operation,...Ch. 4.4 - In Problems 1-14, perform the indicated operation,...Ch. 4.4 - In Problems 1-14, perform the indicated operation,...Ch. 4.4 - In Problems 1-14, perform the indicated operation,...Ch. 4.4 - In Problems 1-14, perform the indicated operation,...Ch. 4.4 - In Problems 1-14, perform the indicated operation,...Ch. 4.4 - Prob. 7ECh. 4.4 - In Problems 1-14, perform the indicated operation,...Ch. 4.4 - In Problems 1-14, perform the indicated operation,...Ch. 4.4 - In Problems 1-14, perform the indicated operation,...Ch. 4.4 - In Problems 1-14, perform the indicated operation,...Ch. 4.4 - In Problems 1-14, perform the indicated operation,...Ch. 4.4 - In Problems 1-14, perform the indicated operation,...Ch. 4.4 - Prob. 14ECh. 4.4 - In Problems 15-22, find the matrix product. Note...Ch. 4.4 - In Problems 15-22, find the matrix product. Note...Ch. 4.4 - In Problems 15-22, find the matrix product. Note...Ch. 4.4 - In Problems 15-22, find the matrix product. Note...Ch. 4.4 - In Problems 15-22, find the matrix product. Note...Ch. 4.4 - In Problems 15-22, find the matrix product. Note...Ch. 4.4 - In Problems 15-22, find the matrix product. Note...Ch. 4.4 - In Problems 15-22, find the matrix product. Note...Ch. 4.4 - Find the products in Problems 23-30. 3254Ch. 4.4 - Find the products in Problems 23-30. 3524Ch. 4.4 - Find the products in Problems 23-30. 5432Ch. 4.4 - Find the products in Problems 23-30. 2435Ch. 4.4 - Find the products in Problems 23-30. 101213Ch. 4.4 - Find the products in Problems 23-30. 113201Ch. 4.4 - Find the products in Problems 23-30. 213101Ch. 4.4 - Find the products in Problems 23-30. 201113Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - Problems 31-48 refer to the following matrices:...Ch. 4.4 - If aandb are nonzero real numbers A=aabb,andB=aaaa...Ch. 4.4 - If aandb are nonzero real numbers,...Ch. 4.4 - If aandb are nonzero real numbers and A=abb2a2ab...Ch. 4.4 - If aandb are nonzero real numbers and A=abab1ab2ab...Ch. 4.4 - In Problems 53-54, use a graphing calculator to...Ch. 4.4 - In Problems 53-54, use a graphing calculator to...Ch. 4.4 - Find a,b,c, and d so that abcd+2301=1234Ch. 4.4 - Find w,x,y, and z so that 4230+wxyz=2305Ch. 4.4 - Find a,b,c, and d so that 1223abcd=1032Ch. 4.4 - Find a,b,c, and d so that 1314abcd=6577Ch. 4.4 - In Problems 59-62, determine whether the statement...Ch. 4.4 - In Problems 59-62, determine whether the statement...Ch. 4.4 - In Problems 59-62, determine whether the statement...Ch. 4.4 - In Problems 59-62, determine whether the statement...Ch. 4.4 - A square matrix is a diagonal matrix if all...Ch. 4.4 - A square matrix is an upper triangular matrix if...Ch. 4.4 - Cost analysis. A company with two different plants...Ch. 4.4 - Cost analysis. If both labor and materials at...Ch. 4.4 - Markup. An import car dealer sells three models of...Ch. 4.4 - Markup. Referring to Problem 67, what is the...Ch. 4.4 - Labor costs. A company with manufacturing plants...Ch. 4.4 - Inventory value. A personal computer retail...Ch. 4.4 - Cereal. A nutritionist for a cereal company blends...Ch. 4.4 - Heredity. Gregor Mendel (1822-1884) made...Ch. 4.4 - Politics. In a local California election, a public...Ch. 4.4 - Test averages. A teacher has given four tests to a...Ch. 4.5 - The only real number solutions to the equation...Ch. 4.5 - (A) Suppose that the square matrix M has a row of...Ch. 4.5 - The inverse of A=abcd is...Ch. 4.5 - Multiply (a) 10012357and23571001 (b)...Ch. 4.5 - Let M=311110101 (A) Form the augmented matrix MI....Ch. 4.5 - Find M1, given M=2612Ch. 4.5 - Find N1,givenN=3162.Ch. 4.5 - The message below was also encoded with the matrix...Ch. 4.5 - In Problems 1-4, find the additive inverse and...Ch. 4.5 - In Problems 1-4, find the additive inverse and...Ch. 4.5 - Prob. 3ECh. 4.5 - Prob. 4ECh. 4.5 - In Problems 5-8, does the given matrix have a...Ch. 4.5 - In Problems 5-8, does the given matrix have a...Ch. 4.5 - In Problems 5-8, does the given matrix have a...Ch. 4.5 - In Problems 5-8, does the given matrix have a...Ch. 4.5 - In Problems 9-18, find the matrix products. Note...Ch. 4.5 - In Problems 9-18, find the matrix products. Note...Ch. 4.5 - In Problems 9-18, find the matrix products. Note...Ch. 4.5 - In Problems 9-18, find the matrix products. Note...Ch. 4.5 - In Problems 9-18, find the matrix products. Note...Ch. 4.5 - In Problems 9-18, find the matrix products. Note...Ch. 4.5 - In Problems 9-18, find the matrix products. Note...Ch. 4.5 - In Problems 9-18, find the matrix products. Note...Ch. 4.5 - In Problems 9-18, find the matrix products. Note...Ch. 4.5 - In Problems 9-18, find the matrix products. Note...Ch. 4.5 - In Problems 19-28, examine the product of the two...Ch. 4.5 - In Problems 19-28, examine the product of the two...Ch. 4.5 - In Problems 19-28, examine the product of the two...Ch. 4.5 - In Problems 19-28, examine the product of the two...Ch. 4.5 - In Problems 19-28, examine the product of the two...Ch. 4.5 - In Problems 19-28, examine the product of the two...Ch. 4.5 - In Problems 19-28, examine the product of the two...Ch. 4.5 - In Problems 19-28, examine the product of the two...Ch. 4.5 - In Problems 19-28, examine the product of the two...Ch. 4.5 - In Problems 19-28, examine the product of the two...Ch. 4.5 - Without performing any row operations, explain why...Ch. 4.5 - Without performing any row operations, explain why...Ch. 4.5 - Without performing any row operations, explain why...Ch. 4.5 - Without performing any row operations, explain why...Ch. 4.5 - Without performing any row operations, explain why...Ch. 4.5 - Without performing any row operations, explain why...Ch. 4.5 - Without performing any row operations, explain why...Ch. 4.5 - Without performing any row operations, explain why...Ch. 4.5 - Without performing any row operations, explain why...Ch. 4.5 - Without performing any row operations, explain why...Ch. 4.5 - Given M in Problems 39-48, Find M1 and show that...Ch. 4.5 - Given M in Problems 39-48, Find M1 and show that...Ch. 4.5 - Given M in Problems 39-48, Find M1 and show that...Ch. 4.5 - Given M in Problems 39-48, Find M1 and show that...Ch. 4.5 - Given M in Problems 39-48, Find M1 and show that...Ch. 4.5 - Given M in Problems 39-48, Find M1 and show that...Ch. 4.5 - Given M in Problems 39-48, Find M1 and show that...Ch. 4.5 - Given M in Problems 39-48, Find M1 and show that...Ch. 4.5 - Given M in Problems 39-48, Find M1 and show that...Ch. 4.5 - Given M in Problems 39-48, Find M1 and show that...Ch. 4.5 - Find the inverse of each matrix in Problems 49-56,...Ch. 4.5 - Find the inverse of each matrix in Problems 49-56,...Ch. 4.5 - Find the inverse of each matrix in Problems 49-56,...Ch. 4.5 - Find the inverse of each matrix in Problems 49-56,...Ch. 4.5 - Find the inverse of each matrix in Problems 49-56,...Ch. 4.5 - Find the inverse of each matrix in Problems 49-56,...Ch. 4.5 - Find the inverse of each matrix in Problems 49-56,...Ch. 4.5 - Find the inverse of each matrix in Problems 49-56,...Ch. 4.5 - In Problems 57-60, find the inverse. Note that...Ch. 4.5 - In Problems 57-60, find the inverse. Note that...Ch. 4.5 - In Problems 57-60, find the inverse. Note that...Ch. 4.5 - In Problems 57-60, find the inverse. Note that...Ch. 4.5 - Find the inverse of each matrix in Problems 61-68,...Ch. 4.5 - Find the inverse of each matrix in Problems 61-68,...Ch. 4.5 - Find the inverse of each matrix in Problems 61-68,...Ch. 4.5 - Find the inverse of each matrix in Problems 61-68,...Ch. 4.5 - Find the inverse of each matrix in Problems 61-68,...Ch. 4.5 - Find the inverse of each matrix in Problems 61-68,...Ch. 4.5 - Find the inverse of each matrix in Problems 61-68,...Ch. 4.5 - Find the inverse of each matrix in Problems 6168,...Ch. 4.5 - Show that A11=Afor;A=4332Ch. 4.5 - Show that AB1=B1A1for A=4332andB=2537Ch. 4.5 - Discuss the existence of M1 for 22 diagonal...Ch. 4.5 - Discuss the existence of M1for22 for upper...Ch. 4.5 - Prob. 73ECh. 4.5 - In Problems 73-75, find A1 and A2. 5465Ch. 4.5 - In Problems 73-75, find A1 and A2. 5385Ch. 4.5 - Based on your observations in Problems 73-75, if...Ch. 4.5 - Problems 77-80 refer to the encoding matrix A=1213...Ch. 4.5 - Problems 77-80 refer to the encoding matrix A=1213...Ch. 4.5 - Problems 77-80 refer to the encoding matrix A=1213...Ch. 4.5 - Problems 77-80 refer to the encoding matrix A=1213...Ch. 4.5 - Problems 81-84 require the use of a graphing...Ch. 4.5 - Problems 81-84 require the use of a graphing...Ch. 4.5 - Problems 81-84 require the use of a graphing...Ch. 4.5 - Problems 81-84 require the use of a graphing...Ch. 4.5 - Problems 85-88 require the use of a graphing...Ch. 4.5 - Problems 85-88 require the use of a graphing...Ch. 4.5 - Problems 85-88 require the use of a graphing...Ch. 4.5 - Problems 85-88 require the use of a graphing...Ch. 4.6 - Refer to the mathematical model in Example 4:...Ch. 4.6 - Given an nn matrix Aandn1 column matrices...Ch. 4.6 - Use matrix inverse methods to solve the system:...Ch. 4.6 - Use matrix inverse methods to solve each of the...Ch. 4.6 - Repeat Example 4 with investment A paying 4 and...Ch. 4.6 - In Problems 1-8, solve each equation for x, where...Ch. 4.6 - In Problems 1-8, solve each equation for x, where...Ch. 4.6 - In Problems 1-8, solve each equation for x, where...Ch. 4.6 - In Problems 1-8, solve each equation for x, where...Ch. 4.6 - In Problems 1-8, solve each equation for x, where...Ch. 4.6 - In Problems 1-8, solve each equation for x, where...Ch. 4.6 - In Problems 1-8, solve each equation for x, where...Ch. 4.6 - In Problems 1-8, solve each equation for x, where...Ch. 4.6 - Write Problems 9-12 as systems of linear equations...Ch. 4.6 - Write Problems 9-12 as systems of linear equations...Ch. 4.6 - Write Problems 9-12 as systems of linear equations...Ch. 4.6 - Write Problems 9-12 as systems of linear equations...Ch. 4.6 - Write each system in Problems 13-16 as a matrix...Ch. 4.6 - Write each system in Problems 13-16 as a matrix...Ch. 4.6 - Write each system in Problems 13-16 as a matrix...Ch. 4.6 - Write each system in Problems 13-16 as a matrix...Ch. 4.6 - Find x1andx2 in problems 17-20. x1x2=321421Ch. 4.6 - Find x1andx2 in problems 17-20. x1x2=211232Ch. 4.6 - Find x1andx2 in problems 17-20. x1x2=232132Ch. 4.6 - Find x1andx2 in problems 17-20. x1x2=310221Ch. 4.6 - In Problems 21-24, find x1 and x2. 1112x1x2=57Ch. 4.6 - In Problems 21-24, find x1 and x2. 1314x1x2=96Ch. 4.6 - In Problems 21-24, find x1 and x2. 1123x1x2=1510Ch. 4.6 - In Problems 21-24, find x1 and x2. 1132x1x2=1020Ch. 4.6 - In Problems 25-30, solve for x1andx2....Ch. 4.6 - In Problems 25-30, solve for x1andx2....Ch. 4.6 - In Problems 25-30, solve for x1andx2....Ch. 4.6 - In Problems 25-30, solve for x1andx2....Ch. 4.6 - In Problems 25-30, solve for x1andx2....Ch. 4.6 - In Problems 25-30, solve for x1andx2....Ch. 4.6 - In Problems 31-38, write each system as a matrix...Ch. 4.6 - In Problems 31-38, write each system as a matrix...Ch. 4.6 - In Problems 31-38, write each system as a matrix...Ch. 4.6 - In Problems 31-38, write each system as a matrix...Ch. 4.6 - In Problems 31-38, write each system as a matrix...Ch. 4.6 - In Problems 31-38, write each system as a matrix...Ch. 4.6 - In Problems 31-38, write each system as a matrix...Ch. 4.6 - In Problems 31-38, write each system as a matrix...Ch. 4.6 - In Problems 39-44, the matrix equation is not...Ch. 4.6 - In Problems 39-44, the matrix equation is not...Ch. 4.6 - In Problems 39-44, the matrix equation is not...Ch. 4.6 - In Problems 39-44, the matrix equation is not...Ch. 4.6 - In Problems 39-44, the matrix equation is not...Ch. 4.6 - In Problems 39-44, the matrix equation is not...Ch. 4.6 - In Problems 45-50, explain why the system cannot...Ch. 4.6 - In Problems 45-50, explain why the system cannot...Ch. 4.6 - In Problems 45-50, explain why the system cannot...Ch. 4.6 - In Problems 45-50, explain why the system cannot...Ch. 4.6 - In Problems 45-50, explain why the system cannot...Ch. 4.6 - In Problems 45-50, explain why the system cannot...Ch. 4.6 - For nn matrices A and B, and n1 column matrices...Ch. 4.6 - For nn matrices A and B, and n1 column matrices...Ch. 4.6 - For nn matrices A and B, and n1 column matrices...Ch. 4.6 - For nn matrices A and B, and n1 column matrices...Ch. 4.6 - For nn matrices A and B, and n1 column matrices...Ch. 4.6 - For nn matrices A and B, and n1 column matrices...Ch. 4.6 - In Problems 57 and 58, solve for x1andx2....Ch. 4.6 - In Problems 57 and 58, solve for x1andx2....Ch. 4.6 - In Problems 59-62. Write each system as a matrix...Ch. 4.6 - In Problems 59-62. Write each system as a matrix...Ch. 4.6 - In Problems 59-62. Write each system as a matrix...Ch. 4.6 - In Problems 59-62. Write each system as a matrix...Ch. 4.6 - Construct a mathematical model for each of the...Ch. 4.6 - Construct a mathematical model for each of the...Ch. 4.6 - Construct a mathematical model for each of the...Ch. 4.6 - Construct a mathematical model for each of the...Ch. 4.6 - Incentive plan. A small company provides an...Ch. 4.6 - Incentive plan. Repeat Problem 67 if the company...Ch. 4.6 - Diets. A biologist has available two commercial...Ch. 4.6 - Education. A stale university system is planning...Ch. 4.7 - If equations 2 and 3 are valid for an economy with...Ch. 4.7 - An economy is based on three sectors, coal, oil...Ch. 4.7 - In Problems 18, solve each equation for x, where x...Ch. 4.7 - In Problems 1-8, solve each equation for x, where...Ch. 4.7 - In Problems 1-8, solve each equation for x, where...Ch. 4.7 - In Problems 1-8, solve each equation for x, where...Ch. 4.7 - In Problems 1-8, solve each equation for x, where...Ch. 4.7 - In Problems 1-8, solve each equation for x, where...Ch. 4.7 - In Problems 1-8, solve each equation for x, where...Ch. 4.7 - In Problems 1-8, solve each equation for x, where...Ch. 4.7 - Problems 9-14 pertain to the following...Ch. 4.7 - Problems 9-14 pertain to the following...Ch. 4.7 - Problems 9-14 pertain to the following...Ch. 4.7 - Problems 9-14 pertain to the following...Ch. 4.7 - Problems 9-14 pertain to the following...Ch. 4.7 - Problems 9-14 pertain to the following...Ch. 4.7 - Problems 15-20 pertain to the following...Ch. 4.7 - Problems 15-20 pertain to the following...Ch. 4.7 - Problems 15-20 pertain to the following...Ch. 4.7 - Problems 15-20 pertain to the following...Ch. 4.7 - Problems 15-20 pertain to the following...Ch. 4.7 - Problems 15-20 pertain to the following...Ch. 4.7 - In Problems 21-26, find IM1 and X....Ch. 4.7 - In Problems 21-26, find IM1 and X....Ch. 4.7 - In Problems 21-26, find IM1 and X....Ch. 4.7 - In Problems 21-26, find IM1 and X....Ch. 4.7 - In Problems 21-26, find IM1 and X....Ch. 4.7 - In Problems 21-26, find IM1 and X....Ch. 4.7 - The technology matrix for an economy based on...Ch. 4.7 - The technology matrix for an economy based on...Ch. 4.7 - Refer to Problem 27. Fill in the elements in the...Ch. 4.7 - Refer lo Problem 28. Fill in the elements in the...Ch. 4.7 - The technology matrix for an economy based on...Ch. 4.7 - The technology matrix for an economy based on...Ch. 4.7 - All the technology matrices in the text have...Ch. 4.7 - The sum of the elements in a column of any of the...Ch. 4.7 - Coal, steel. An economy is based on two industrial...Ch. 4.7 - Transportation, manufacturing. An economy is based...Ch. 4.7 - Agriculture, tourism. The economy of a small...Ch. 4.7 - Agriculture, oil. The economy of a country is...Ch. 4.7 - Agriculture, manufacturing, energy. An economy is...Ch. 4.7 - Electricity, natural gas, oil. A large energy...Ch. 4.7 - Four sectors. An economy is based on four sectors,...Ch. 4.7 - Repeal Problem 41 with the following tableCh. 4 - Solve the following system by graphing 2xy=4x2y=4Ch. 4 - Solve the system in Problem 1 by substitution...Ch. 4 - If a matrix is in reduced form, say so. If not,...Ch. 4 - Given matrices A and B. A=5310248130 B=320417 (A)...Ch. 4 - Find x1andx2 : (A) 1213x1x2=42 (B)...Ch. 4 - In Problem 6-14, perform the operations that are...Ch. 4 - In Problem 6-14, perform the operations that are...Ch. 4 - In Problem 6-14, perform the operations that are...Ch. 4 - In Problem 6-14, perform the operations that are...Ch. 4 - In Problem 6-14, perform the operations that are...Ch. 4 - In Problem 6-14, perform the operations that are...Ch. 4 - In Problem 6-14, perform the operations that are...Ch. 4 - In Problem 6-14, perform the operations that are...Ch. 4 - In Problem 6-14, perform the operations that are...Ch. 4 - Find the inverse of the matrix A given below by...Ch. 4 - Solve the following system using elimination by...Ch. 4 - Solve the system in Problem 16 by performing...Ch. 4 - Solve the system in Problem 16 by writing the...Ch. 4 - In Problems 19-24, perform the operations that are...Ch. 4 - In Problems 19-24, perform the operations that are...Ch. 4 - In Problems 19-24, perform the operations that are...Ch. 4 - In Problems 1924, perform the operations that are...Ch. 4 - In Problems 19-24, perform the operations that are...Ch. 4 - In Problems 19-24, perform the operations that are...Ch. 4 - Find the inverse of the matrix A given below by...Ch. 4 - Solve by Gauss-Jordan elimination: (A)...Ch. 4 - Solve the system in Problem 26A by writing the...Ch. 4 - Discuss the relationship between the numbers of...Ch. 4 - An economy is based on two sectors, agriculture...Ch. 4 - Use the matrix M in Problem 29 to fill in the...Ch. 4 - An economy is based on two sectors, coal and...Ch. 4 - Use graphical approximation techniques on a...Ch. 4 - Find the inverse of the matrix A given below. Show...Ch. 4 - Solve the system...Ch. 4 - Solve Problem 34 by Gauss-Jordan elimination.Ch. 4 - Given the technology matrix M and the final demand...Ch. 4 - Discuss the number of solutions for a system of n...Ch. 4 - Discuss the number of solutions for the system...Ch. 4 - One solution to the input-output equation X=MX+D...Ch. 4 - Break-even analysis. A cookware manufacturer is...Ch. 4 - Resource allocation. An international mining...Ch. 4 - Resource allocation. (A) Set up Problem 41 as a...Ch. 4 - Business leases. A grain company wants to lease a...Ch. 4 - Material costs. A manufacturer wishes to make two...Ch. 4 - Labor costs. A company with manufacturing plants...Ch. 4 - Investment analysis. A person has $5,000 to...Ch. 4 - Investment analysis. Solve Problem 46 by using a...Ch. 4 - Investment analysis. In Problem 46, is it possible...Ch. 4 - Ticket prices. An outdoor amphitheater has 25,000...Ch. 4 - Ticket prices. Discuss the effect on the solutions...Ch. 4 - Input-output analysis. An economy is based on two...Ch. 4 - Cryptography. The following message was encoded...Ch. 4 - Traffic flow. The rush-hour traffic flow (in...
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