8.10 Chapter 2. Second order differential equations. Section 2.4. The method of variation of parameters. Excercises page 156

8.10.1 problem 1
8.10.2 problem 2
8.10.3 problem 3
8.10.4 problem 4
8.10.5 problem 5
8.10.6 problem 6
8.10.7 problem 7
8.10.8 problem 8
8.10.9 problem 9
8.10.10 problem 10
8.10.11 problem 12