20.19 Chapter 9, First order linear systems. Section 9.8 (Matrix exponential function), page 642

20.19.1 problem 2
20.19.2 problem 3
20.19.3 problem 4
20.19.4 problem 5
20.19.5 problem 6
20.19.6 problem 7
20.19.7 problem 8
20.19.8 problem 9
20.19.9 problem 10
20.19.10 problem 11