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Fundamentals of Differential Equations [With CDROM] - 7th Edition
7th Edition
ISBN: 9780321410481
Author: Saff, Edward B., Snider, Arthur David, Nagle, R. Kent
Publisher: Addison Wesley
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Chapter 9.5, Problem 20E
In Problems 19-24, find a fundamental matrix for the system
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Chapter 9 Solutions
Fundamentals of Differential Equations [With CDROM] - 7th Edition
Ch. 9.1 - In Problems 1 -6, express the given system of...Ch. 9.1 - In Problems 1 -6, express the given system of...Ch. 9.1 - In Problems 1 -6, express the given system of...Ch. 9.1 - In Problems 1 -6, express the given system of...Ch. 9.1 - In Problems 1 -6, express the given system of...Ch. 9.1 - In Problems 1 -6, express the given system of...Ch. 9.1 - In Problems 7 -10, express the given higher-order...Ch. 9.1 - In Problems 7 -10, express the given higher-order...Ch. 9.1 - In Problems 7 -10, express the given higher-order...Ch. 9.1 - In Problems 7 -10, express the given higher-order...
Ch. 9.1 - In Problems 11 -13, express the given system of...Ch. 9.1 - In Problems 11 -13, express the given system of...Ch. 9.1 - In Problems 11 -13, express the given system of...Ch. 9.2 - In Problems 1-11, find all solutions to the system...Ch. 9.2 - Prob. 2ECh. 9.2 - Prob. 3ECh. 9.2 - Prob. 4ECh. 9.2 - Prob. 5ECh. 9.2 - Prob. 6ECh. 9.2 - Prob. 7ECh. 9.2 - Prob. 8ECh. 9.2 - Prob. 9ECh. 9.2 - Prob. 10ECh. 9.2 - In Problems 1-11, find all solutions to the system...Ch. 9.2 - Use the Gauss-Jordan elimination algorithm to show...Ch. 9.2 - Prob. 13ECh. 9.2 - Prob. 14ECh. 9.3 - 9.3 Exercises Let A:=[2135] and B:=[1023] Find a...Ch. 9.3 - Prob. 2ECh. 9.3 - Let A=[2411] and B=[21352] Find a AB. b A2=AA b...Ch. 9.3 - Prob. 4ECh. 9.3 - Let A=[1223], B=[1011] and C=[1121] Find a AB. b...Ch. 9.3 - Prob. 6ECh. 9.3 - 9.3 Exercises a. Show that if u and v are each n1...Ch. 9.3 - Prob. 8ECh. 9.3 - Prob. 9ECh. 9.3 - Prob. 10ECh. 9.3 - In Problem 9-14, use the method of Example 1 to...Ch. 9.3 - In Problem 9-14, use the method of Example 1 to...Ch. 9.3 - In Problem 9-14, use the method of Example 1 to...Ch. 9.3 - In Problem 9-14, use the method of Example 1 to...Ch. 9.3 - Prove that if xp satisfy Axp=b, then every...Ch. 9.3 - Let A=[211121112] a. Show that A is singular. b....Ch. 9.3 - In Problems 17-20, find the matrix X1(t) whose...Ch. 9.3 - Prob. 18ECh. 9.3 - Prob. 19ECh. 9.3 - Prob. 20ECh. 9.3 - Prob. 21ECh. 9.3 - Prob. 22ECh. 9.3 - Prob. 23ECh. 9.3 - Prob. 24ECh. 9.3 - Prob. 25ECh. 9.3 - Prob. 26ECh. 9.3 - Prob. 27ECh. 9.3 - Prob. 28ECh. 9.3 - Prob. 29ECh. 9.3 - Prob. 30ECh. 9.3 - Prob. 31ECh. 9.3 - Prob. 32ECh. 9.3 - Prob. 33ECh. 9.3 - 9.3 Exercises Find dx/dt for the given matrix...Ch. 9.3 - 9.3 Exercises Verify that the given vector...Ch. 9.3 - Prob. 36ECh. 9.3 - Prob. 37ECh. 9.3 - Prob. 38ECh. 9.3 - Prob. 39ECh. 9.3 - Prob. 40ECh. 9.3 - Prob. 41ECh. 9.3 - Prob. 42ECh. 9.3 - Prob. 43ECh. 9.4 - In Problems 14, write the given system in the...Ch. 9.4 - Prob. 2ECh. 9.4 - In Problems 14, write the given system in the...Ch. 9.4 - In Problems 14, write the given system in the...Ch. 9.4 - In Problems 5-8, rewrite the given scalar equation...Ch. 9.4 - In Problems 5-8, rewrite the given scalar equation...Ch. 9.4 - In Problems 5-8, rewrite the given scalar equation...Ch. 9.4 - In Problems 5-8, rewrite the given scalar equation...Ch. 9.4 - In Problems 9-12, write the given system as a set...Ch. 9.4 - In Problems 9-12, write the given system as a set...Ch. 9.4 - In Problems 9-12, write the given system as a set...Ch. 9.4 - In Problems 9-12, write the given system as a set...Ch. 9.4 - In Problems 13-19, determine whether the given...Ch. 9.4 - In Problems 13-19, determine whether the given...Ch. 9.4 - In Problems 13-19, determine whether the given...Ch. 9.4 - In Problems 13-19, determine whether the given...Ch. 9.4 - In Problems 13-19, determine whether the given...Ch. 9.4 - In Problems 13-19, determine whether the given...Ch. 9.4 - In Problem 13-19, determine whether the given...Ch. 9.4 - Let...Ch. 9.4 - In Problems 21-24, the given vector functions are...Ch. 9.4 - In Problems 21-24, the given vector functions are...Ch. 9.4 - In Problems 21-24, the given vector functions are...Ch. 9.4 - In Problems 21-24, the given vector functions are...Ch. 9.4 - Verify that the vector functions x1=[etet] and...Ch. 9.4 - Verify that the vector functions...Ch. 9.4 - Prove that the operator define by L[x]:=xAx, where...Ch. 9.4 - Let X(t) be a fundamental matrix for the system...Ch. 9.4 - In Problem 29-30, verify that X(t) is a...Ch. 9.4 - Prob. 30ECh. 9.4 - Prob. 31ECh. 9.4 - Abels Formula. If x1,,xn are any n solutions to...Ch. 9.4 - Using Abels formula Problem 32, confirm that the...Ch. 9.4 - Prob. 34ECh. 9.4 - Prob. 35ECh. 9.4 - Prob. 36ECh. 9.4 - Prob. 37ECh. 9.4 - Prob. 38ECh. 9.5 - In Problems 1-8, find the eigenvalues and...Ch. 9.5 - Prob. 2ECh. 9.5 - In Problems 1-8, find the eigenvalues and...Ch. 9.5 - In Problems 1-8, find the eigenvalues and...Ch. 9.5 - In Problems 1-8, find the eigenvalues and...Ch. 9.5 - In Problems 1-8, find the eigenvalues and...Ch. 9.5 - In Problems 1-8, find the eigenvalues and...Ch. 9.5 - Prob. 8ECh. 9.5 - Prob. 9ECh. 9.5 - Prob. 10ECh. 9.5 - In Problems 11-16, find a general solution of the...Ch. 9.5 - In Problems 11-16, find a general solution of the...Ch. 9.5 - In Problems 11-16, find a general solution of the...Ch. 9.5 - In Problems 11-16, find a general solution of the...Ch. 9.5 - In Problems 11-16, find a general solution of the...Ch. 9.5 - In Problems 11-16, find a general solution of the...Ch. 9.5 - Consider the system x (t)=Ax(t),t0 with A=[1331]...Ch. 9.5 - Consider the system x(t)=Ax(t),t0 with A=[2112] a....Ch. 9.5 - In Problems 19-24, find a fundamental matrix for...Ch. 9.5 - In Problems 19-24, find a fundamental matrix for...Ch. 9.5 - In Problems 19-24, find a fundamental matrix for...Ch. 9.5 - In Problems 19-24, find a fundamental matrix for...Ch. 9.5 - In Problems 19-24, find a fundamental matrix for...Ch. 9.5 - In Problems 31-34, solve the given initial value...Ch. 9.5 - In Problems 31-34, solve the given initial value...Ch. 9.5 - In Problems 31-34, solve the given initial value...Ch. 9.5 - In Problems 31-34, solve the given initial value...Ch. 9.5 - a. Show that the matrix A=[1143] has the repeated...Ch. 9.5 - Prob. 36ECh. 9.5 - Prob. 37ECh. 9.5 - Prob. 38ECh. 9.5 - a. Show that the matrix A=[211121221] has the...Ch. 9.5 - Prob. 40ECh. 9.5 - Prob. 41ECh. 9.5 - Prob. 42ECh. 9.5 - Prob. 43ECh. 9.5 - Prob. 44ECh. 9.5 - Mixing Between Interconnected Tanks. Two tanks,...Ch. 9.5 - Prob. 46ECh. 9.5 - Prob. 48ECh. 9.5 - Stability.A homogeneous system x=Ax with constant...Ch. 9.5 - Prob. 50ECh. 9.6 - In Problems 1-4, find a general solution of the...Ch. 9.6 - In Problems 1-4, find a general solution of the...Ch. 9.6 - In Problems 1-4, find a general solution of the...Ch. 9.6 - In Problems 1-4, find a general solution of the...Ch. 9.6 - In Problems 5-9, find a fundamental matrix for the...Ch. 9.6 - In Problems 5-9, find a fundamental matrix for the...Ch. 9.6 - In Problems 5-9, find a fundamental matrix for the...Ch. 9.6 - In Problems 5-9, find a fundamental matrix for the...Ch. 9.6 - 9.6 Exercises Find a fundamental matrix for the...Ch. 9.6 - In Problems 13 and 14, find the solution to the...Ch. 9.6 - In Problems 13 and 14, find the solution to the...Ch. 9.6 - Show that x1(t) and x2(t) given by equations 4 and...Ch. 9.6 - Show that x1(t) and x2(t) given by equations 4 and...Ch. 9.6 - In Problems 17 and 18, use the results of Problem...Ch. 9.6 - In Problems 17 and 18, use the results of Problem...Ch. 9.6 - For the coupled mass-spring system governed by...Ch. 9.6 - For the coupled mas-spring system governed by...Ch. 9.6 - Prob. 21ECh. 9.6 - Prob. 22ECh. 9.6 - Stability: In Problem 49 of Exercises 9.5, page...Ch. 9.6 - a. a For Example 1, page 535, verify that...Ch. 9.7 - In Problems 1-6, use the method of undetermined...Ch. 9.7 - In Problems 1-6, use the method of undetermined...Ch. 9.7 - In Problems 1-6, use the method of undetermined...Ch. 9.7 - Prob. 4ECh. 9.7 - In Problems 1-6, use the method of undetermined...Ch. 9.7 - In Problems 1-6, use the method of undetermined...Ch. 9.7 - In Problems 7-10, use the method of undetermined...Ch. 9.7 - In Problems 7-10, use the method of undetermined...Ch. 9.7 - In Problems 7-10, use the method of undetermined...Ch. 9.7 - In Problems 7-10, use the method of undetermined...Ch. 9.7 - In Problems 11-16, use the variation of parameters...Ch. 9.7 - Prob. 12ECh. 9.7 - In Problems 11-16, use the variation of parameters...Ch. 9.7 - Prob. 14ECh. 9.7 - In Problems 11-16, use the variation of parameters...Ch. 9.7 - In Problems 11-16, use the variation of parameters...Ch. 9.7 - Find the solution to the given system that...Ch. 9.7 - 9.7 Exercises In Problems 21 and 22, find the...Ch. 9.7 - Using matrix algebra techniques and method of...Ch. 9.7 - Prob. 24ECh. 9.7 - To find a general solution to the system...Ch. 9.7 - For the system of Problem 25, we found that a...Ch. 9.7 - .Find a general solution of the system...Ch. 9.7 - Prob. 28ECh. 9.7 - Prob. 29ECh. 9.7 - Prob. 30ECh. 9.7 - Prob. 31ECh. 9.7 - Prob. 32ECh. 9.7 - Prob. 33ECh. 9.7 - Prob. 34ECh. 9.8 - In Problems 1-6, a show that the given matrix A...Ch. 9.8 - Prob. 2ECh. 9.8 - Prob. 3ECh. 9.8 - Prob. 4ECh. 9.8 - Prob. 5ECh. 9.8 - Prob. 6ECh. 9.8 - In Problems 7-10, determine eAt by first finding a...Ch. 9.8 - Prob. 8ECh. 9.8 - Prob. 9ECh. 9.8 - In Problems 7-10, determine eAt by first finding a...Ch. 9.8 - In Problems 11 and 12, determine eAt by using...Ch. 9.8 - In Problems 11 and 12, determine eAt by using...Ch. 9.8 - In Problems 17-20, use the generalized...Ch. 9.8 - Prob. 18ECh. 9.8 - Prob. 19ECh. 9.8 - Prob. 20ECh. 9.8 - Prob. 21ECh. 9.8 - Prob. 22ECh. 9.8 - Prob. 23ECh. 9.8 - Prob. 24ECh. 9.8 - Prob. 25ECh. 9.8 - Prob. 26ECh. 9.RP - In Problems 1-4, find a general solution for the...Ch. 9.RP - In Problems 1-4, find a general solution for the...Ch. 9.RP - In Problems 1-4, find a general solution for the...Ch. 9.RP - In Problems 1-4, find a general solution for the...Ch. 9.RP - In Problems 5 and 6, find a fundamental matrix for...Ch. 9.RP - Prob. 6RPCh. 9.RP - In Problems 7-10, find a general solution for the...Ch. 9.RP - Prob. 8RPCh. 9.RP - In Problems 7-10, find a general solution for the...Ch. 9.RP - In Problems 7-10, find a general solution for the...Ch. 9.RP - In Problems 11 and 12, solve the given initial...Ch. 9.RP - In Problems 11 and 12, solve the given initial...Ch. 9.RP - In Problems 13 and 14, find a general solution for...Ch. 9.RP - In Problems 13 and 14, find a general solution for...Ch. 9.RP - In Problems 15 and 16, find the fundamental matrix...Ch. 9.RP - In Problems 15 and 16, find the fundamental matrix...
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- Question 2. An American option on a stock has payoff given by F = f(St) when it is exercised at time t. We know that the function f is convex. A person claims that because of convexity, it is optimal to exercise at expiration T. Do you agree with them?arrow_forwardQuestion 4. We consider a CRR model with So == 5 and up and down factors u = 1.03 and d = 0.96. We consider the interest rate r = 4% (over one period). Is this a suitable CRR model? (Explain your answer.)arrow_forwardQuestion 3. We want to price a put option with strike price K and expiration T. Two financial advisors estimate the parameters with two different statistical methods: they obtain the same return rate μ, the same volatility σ, but the first advisor has interest r₁ and the second advisor has interest rate r2 (r1>r2). They both use a CRR model with the same number of periods to price the option. Which advisor will get the larger price? (Explain your answer.)arrow_forward
- Question 5. We consider a put option with strike price K and expiration T. This option is priced using a 1-period CRR model. We consider r > 0, and σ > 0 very large. What is the approximate price of the option? In other words, what is the limit of the price of the option as σ∞. (Briefly justify your answer.)arrow_forwardQuestion 6. You collect daily data for the stock of a company Z over the past 4 months (i.e. 80 days) and calculate the log-returns (yk)/(-1. You want to build a CRR model for the evolution of the stock. The expected value and standard deviation of the log-returns are y = 0.06 and Sy 0.1. The money market interest rate is r = 0.04. Determine the risk-neutral probability of the model.arrow_forwardSeveral markets (Japan, Switzerland) introduced negative interest rates on their money market. In this problem, we will consider an annual interest rate r < 0. We consider a stock modeled by an N-period CRR model where each period is 1 year (At = 1) and the up and down factors are u and d. (a) We consider an American put option with strike price K and expiration T. Prove that if <0, the optimal strategy is to wait until expiration T to exercise.arrow_forward
- We consider an N-period CRR model where each period is 1 year (At = 1), the up factor is u = 0.1, the down factor is d = e−0.3 and r = 0. We remind you that in the CRR model, the stock price at time tn is modeled (under P) by Sta = So exp (μtn + σ√AtZn), where (Zn) is a simple symmetric random walk. (a) Find the parameters μ and σ for the CRR model described above. (b) Find P Ste So 55/50 € > 1). StN (c) Find lim P 804-N (d) Determine q. (You can use e- 1 x.) Ste (e) Find Q So (f) Find lim Q 004-N StN Soarrow_forwardIn this problem, we consider a 3-period stock market model with evolution given in Fig. 1 below. Each period corresponds to one year. The interest rate is r = 0%. 16 22 28 12 16 12 8 4 2 time Figure 1: Stock evolution for Problem 1. (a) A colleague notices that in the model above, a movement up-down leads to the same value as a movement down-up. He concludes that the model is a CRR model. Is your colleague correct? (Explain your answer.) (b) We consider a European put with strike price K = 10 and expiration T = 3 years. Find the price of this option at time 0. Provide the replicating portfolio for the first period. (c) In addition to the call above, we also consider a European call with strike price K = 10 and expiration T = 3 years. Which one has the highest price? (It is not necessary to provide the price of the call.) (d) We now assume a yearly interest rate r = 25%. We consider a Bermudan put option with strike price K = 10. It works like a standard put, but you can exercise it…arrow_forwardIn this problem, we consider a 2-period stock market model with evolution given in Fig. 1 below. Each period corresponds to one year (At = 1). The yearly interest rate is r = 1/3 = 33%. This model is a CRR model. 25 15 9 10 6 4 time Figure 1: Stock evolution for Problem 1. (a) Find the values of up and down factors u and d, and the risk-neutral probability q. (b) We consider a European put with strike price K the price of this option at time 0. == 16 and expiration T = 2 years. Find (c) Provide the number of shares of stock that the replicating portfolio contains at each pos- sible position. (d) You find this option available on the market for $2. What do you do? (Short answer.) (e) We consider an American put with strike price K = 16 and expiration T = 2 years. Find the price of this option at time 0 and describe the optimal exercising strategy. (f) We consider an American call with strike price K ○ = 16 and expiration T = 2 years. Find the price of this option at time 0 and describe…arrow_forward
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