11.2 Chapter 4.2, Higher order linear differential equations. Constant coefficients. page 180

11.2.1 problem 8
11.2.2 problem 9
11.2.3 problem 10
11.2.4 problem 11
11.2.5 problem 12
11.2.6 problem 13
11.2.7 problem 14
11.2.8 problem 15
11.2.9 problem 16
11.2.10 problem 17
11.2.11 problem 18