(a) Let M be a square matrix such that M² = 0. Let t, c be scalars and c‡0. Show that

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter5: Orthogonality
Section5.5: Applications
Problem 74EQ
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(a) Let M be a square matrix such that M² = 0. Let t, c be scalars and c‡0. Show
that
(b) Let
X =
B
I3
I1
X2 A
c(I+tM)¹ c¹(I - tM)
2
-2
1
1
5 2
-1 2
=
9
e³t
-].
3t
f(t) =
and Xo
=
(i) Show that A has a single eigenvalue X. Find A.
(ii) Show that A = AI + N where N is a nilpotent matrix. Use this to compute the
matrix exponential e¹A
(iii) Use the matrix exponential and the method of variation of parameters to solve
x' = Ax+ f(t), x(0) = xo.
Transcribed Image Text:(a) Let M be a square matrix such that M² = 0. Let t, c be scalars and c‡0. Show that (b) Let X = B I3 I1 X2 A c(I+tM)¹ c¹(I - tM) 2 -2 1 1 5 2 -1 2 = 9 e³t -]. 3t f(t) = and Xo = (i) Show that A has a single eigenvalue X. Find A. (ii) Show that A = AI + N where N is a nilpotent matrix. Use this to compute the matrix exponential e¹A (iii) Use the matrix exponential and the method of variation of parameters to solve x' = Ax+ f(t), x(0) = xo.
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