1. For the matrix A, see the answers to Exercise 1 of Section 4.2.
(a) ;
(b) ;
(c) ;
(d) ;
(e)
2.
(a) ;
(b)
3.
(Note: in this case the matrices A and U commute; so .)
4.
5.
(a) ;
(b) ;
(c) ;
(d)
6.
(a) ;
(b) ;
(c)
7. Hint: If A is similar to B then there exists a nonsingular matrix such that and if B is similar to C then there exists a nonsingular matrix such that
9. Hint: Can you use S and to transform A to B?
10. Hint: If A is similar to B then there is a nonsingular matrix S such that
If A is also equal to ST, then how must T be chosen?
11. Hint: If B is similar to A, then Take determinants of both sides of this equation and make use of results from Section 2 of Chapter 2.
14.
(a) Hint: If A and B are similar, then there exists a nonsingular matrix S such that Look at
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