Program Explanation Given information: The differential equation is x ′ 1 = 4 x 1 + x 2 + x 3 , x ′ 2 = x 1 + 4 x 2 + x 3 and x ′ 3 = x 1 + x 2 + 4 x 3 . Explanation: Consider matrix form of the system of equation as A. A x = [ 4 1 1 1 4 1 1 1 4 ] x The characteristics equation of the coefficient matrix is, [ 4 − λ 1 1 1 4 − λ 1 1 1 4 − λ ] = 0 ( 4 − λ ) [ 4 − λ 1 1 4 − λ ] − 1 [ 1 1 1 4 − λ ] + 1 [ 1 4 − λ 1 1 ] = 0 − λ 3 + 12 λ 2 − 45 λ+5 4 = 0 − λ 2 ( λ − 3 ) + 9 λ ( λ − 3 ) − 18 ( λ − 3 ) = 0 Therefore, the Eigen values of the matrix can be obtained as, ( λ − 3 ) ( − λ 2 + 9 λ − 18 ) = 0 ( λ − 3 ) ( − λ 2 + 6 λ+3λ − 18 ) = 0 ( λ − 3 ) ( λ − 6 ) ( λ − 3 ) = 0 λ = 3 or λ = 6 or λ = 3 The Eigen vector of the coefficient matrix A is in the form as, [ 4 − λ 1 1 1 4 − λ 1 1 1 4 − λ ] [ a b c ] = [ 0 0 0 ] The associated Eigen vector with the matrix Ais v = [ a b c ] T . Substitute 6 for λ in coefficient matrix, [ 4 − 6 1 1 1 4 − 6 1 1 1 4 − 6 ] [ a 1 b 1 c 1 ] = [ 0 0 0 ] [ − 2 1 1 1 − 2 1 1 1 − 2 ] [ a 1 b 1 c 1 ] = [ 0 0 0 ] The scalar equation are shown below, − 2 a 1 + b 1 + c 1 = 0 a 1 − 2 b 1 + c 1 = 0 a 1 + b 1 − 2 c 1 = 0 After solving the equation the value of a 1 , b 1 and c 1 can be obtained as, a 1 = 1 b 1 = 1 c 1 = 1 Therefore, the associated Eigen vector is shown below. v 1 = [ 1 1 1 ] Substitute 3 for λ in coefficient matrix, [ 4 − 3 1 1 1 4 − 3 1 1 1 4 − 3 ] [ a 2 b 2 c 2 ] = [ 0 0 0 ] [ 1 1 1 1 1 1 1 1 1 ] [ a 2 b 2 c 2 ] = [ 0 0 0 ] The scalar equation are shown below, a 2 + b 2 + c 2 = 0 a 2 + b 2 + c 2 = 0 a 2 + b 2 + c 2 = 0 After solving the equation the value of a 2 , b 2 and c 2 can be obtained as, a 2 = 1 b 2 = − 2 c 2 = 1 Therefore, the associated Eigen vector is shown below

Differential Equations: Computing and Modeling (5th Edition), Edwards, Penney & Calvis

5th Edition

ISBN: 9780321816252

Author: C. Henry Edwards, David E. Penney, David Calvis

Publisher: PEARSON

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Chapter 5.2, Problem 19P

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Program Description:Purpose of problem is to obtain the general solution of x′1=4x1+x2+x3,x′2=x1+4x2+x3 and x′3=x1+x2+4x3 .

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Chapter 5.2, Problem 18P

Chapter 5.2, Problem 20P

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Chapter 5 Solutions

Differential Equations: Computing and Modeling (5th Edition), Edwards, Penney & Calvis

Ch. 5.1 - Let A=[2347] and B=[3451]. Find (a) 2A+3B; (b)...Ch. 5.1 - Prob. 2P Ch. 5.1 - Find AB and BA given A=[203415] and B=[137032].Ch. 5.1 - Prob. 4P Ch. 5.1 - Prob. 5P Ch. 5.1 - Prob. 6P Ch. 5.1 - Prob. 7P Ch. 5.1 - Prob. 8P Ch. 5.1 - Prob. 9P Ch. 5.1 - Prob. 10P

Ch. 5.1 - Prob. 11P Ch. 5.1 - Prob. 12P Ch. 5.1 - Prob. 13P Ch. 5.1 - Prob. 14P Ch. 5.1 - Prob. 15P Ch. 5.1 - Prob. 16P Ch. 5.1 - Prob. 17P Ch. 5.1 - Prob. 18P Ch. 5.1 - Prob. 19P Ch. 5.1 - Prob. 20P Ch. 5.1 - Prob. 21P Ch. 5.1 - Prob. 22P Ch. 5.1 - Prob. 23P Ch. 5.1 - Prob. 24P Ch. 5.1 - Prob. 25P Ch. 5.1 - Prob. 26P Ch. 5.1 - Prob. 27P Ch. 5.1 - Prob. 28P Ch. 5.1 - Prob. 29P Ch. 5.1 - Prob. 30P Ch. 5.1 - Prob. 31P Ch. 5.1 - Prob. 32P Ch. 5.1 - Prob. 33P Ch. 5.1 - Prob. 34P Ch. 5.1 - Prob. 35P Ch. 5.1 - Prob. 36P Ch. 5.1 - Prob. 37P Ch. 5.1 - Prob. 38P Ch. 5.1 - Prob. 39P Ch. 5.1 - Prob. 40P Ch. 5.1 - Prob. 41P Ch. 5.1 - Prob. 42P Ch. 5.1 - Prob. 43P Ch. 5.1 - Prob. 44P Ch. 5.1 - Prob. 45P Ch. 5.2 - Prob. 1P Ch. 5.2 - Prob. 2P Ch. 5.2 - Prob. 3P Ch. 5.2 - Prob. 4P Ch. 5.2 - Prob. 5P Ch. 5.2 - Prob. 6P Ch. 5.2 - Prob. 7P Ch. 5.2 - Prob. 8P Ch. 5.2 - Prob. 9P Ch. 5.2 - Prob. 10P Ch. 5.2 - Prob. 11P Ch. 5.2 - Prob. 12P Ch. 5.2 - Prob. 13P Ch. 5.2 - Prob. 14P Ch. 5.2 - Prob. 15P Ch. 5.2 - Prob. 16P Ch. 5.2 - Prob. 17P Ch. 5.2 - Prob. 18P Ch. 5.2 - Prob. 19P Ch. 5.2 - Prob. 20P Ch. 5.2 - Prob. 21P Ch. 5.2 - Prob. 22P Ch. 5.2 - Prob. 23P Ch. 5.2 - Prob. 24P Ch. 5.2 - Prob. 25P Ch. 5.2 - Prob. 26P Ch. 5.2 - Prob. 27P Ch. 5.2 - Prob. 28P Ch. 5.2 - Prob. 29P Ch. 5.2 - Prob. 30P Ch. 5.2 - Prob. 31P Ch. 5.2 - Prob. 32P Ch. 5.2 - Prob. 33P Ch. 5.2 - Prob. 34P Ch. 5.2 - Prob. 35P Ch. 5.2 - Prob. 36P Ch. 5.2 - Prob. 37P Ch. 5.2 - Prob. 38P Ch. 5.2 - Prob. 39P Ch. 5.2 - Prob. 40P Ch. 5.2 - Prob. 41P Ch. 5.2 - Prob. 42P Ch. 5.2 - Prob. 43P Ch. 5.2 - Prob. 44P Ch. 5.2 - Prob. 45P Ch. 5.2 - Prob. 46P Ch. 5.2 - Prob. 47P Ch. 5.2 - Prob. 48P Ch. 5.2 - Prob. 49P Ch. 5.2 - Prob. 50P Ch. 5.3 - Prob. 1P Ch. 5.3 - Prob. 2P Ch. 5.3 - Prob. 3P Ch. 5.3 - Prob. 4P Ch. 5.3 - Prob. 5P Ch. 5.3 - Prob. 6P Ch. 5.3 - Prob. 7P Ch. 5.3 - Prob. 8P Ch. 5.3 - Prob. 9P Ch. 5.3 - Prob. 10P Ch. 5.3 - Prob. 11P Ch. 5.3 - Prob. 12P Ch. 5.3 - Prob. 13P Ch. 5.3 - Prob. 14P Ch. 5.3 - Prob. 15P Ch. 5.3 - Prob. 16P Ch. 5.3 - Prob. 17P Ch. 5.3 - Prob. 18P Ch. 5.3 - Prob. 19P Ch. 5.3 - Prob. 20P Ch. 5.3 - Prob. 21P Ch. 5.3 - Prob. 22P Ch. 5.3 - Prob. 23P Ch. 5.3 - Prob. 24P Ch. 5.3 - Prob. 25P Ch. 5.3 - Prob. 26P Ch. 5.3 - Prob. 27P Ch. 5.3 - Prob. 28P Ch. 5.3 - Prob. 29P Ch. 5.3 - Prob. 30P Ch. 5.3 - Prob. 31P Ch. 5.3 - Prob. 32P Ch. 5.3 - Prob. 33P Ch. 5.3 - Verify Eq. 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Program Description: Purpose of problem is to obtain the general solution of x ′ 1 = 4 x 1 + x 2 + x 3 , x ′ 2 = x 1 + 4 x 2 + x 3 and x ′ 3 = x 1 + x 2 + 4 x 3 .

Solution Summary: The author explains that the purpose of the problem is to obtain the general solution of xprime.

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Program Description:Purpose of problem is to obtain the general solution of x′1=4x1+x2+x3,x′2=x1+4x2+x3 and x′3=x1+x2+4x3 .

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Chapter 5 Solutions