58.8 Chapter 4, Section 4.1. Basic theory of linear differential equations. Exercises page 113

58.8.1 problem 1 (a)
58.8.2 problem 1 (b)
58.8.3 problem 2
58.8.4 problem 4 (a)
58.8.5 problem 8
58.8.6 problem 9
58.8.7 problem 10
58.8.8 problem 11
58.8.9 problem 12
58.8.10 problem 13