Consider the following system of simultaneous first-order difference equations: Xn+1 = 2 yn + 5 xn Yn+1 = -2 Xn with xo = -5 and yo = 3. Write down the coefficient matrix of this system: A = Diagonalise this matrix; that is, find a diagonal matrix D and an invertible matrix Q such that A = QDQ-¹: D = Q = Q-¹

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Consider the following system of simultaneous first-order difference equations:
Xn+1 = 2 yn + 5 xn
Yn+1 = -2 xn
with Xo = -5 and yo = 3.
Write down the coefficient matrix of this system:
A
Diagonalise this matrix; that is, find a diagonal matrix D and an invertible matrix Q such that A = QDQ-¹:
D =
Q =
0-1
Transcribed Image Text:Consider the following system of simultaneous first-order difference equations: Xn+1 = 2 yn + 5 xn Yn+1 = -2 xn with Xo = -5 and yo = 3. Write down the coefficient matrix of this system: A Diagonalise this matrix; that is, find a diagonal matrix D and an invertible matrix Q such that A = QDQ-¹: D = Q = 0-1
Use this to find a closed form solution for the system of difference equations (that is, expressions for xn and yn as functions
of n):
Xn
=
Yn =
Use your answer to find x4 and y4:
X4 =
Y4 =
Transcribed Image Text:Use this to find a closed form solution for the system of difference equations (that is, expressions for xn and yn as functions of n): Xn = Yn = Use your answer to find x4 and y4: X4 = Y4 =
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