20 Chapter 9 Introduction to Linear Higher Order Equations. Section 9.4. Variation of Parameters for Higher Order Equations. Page 503

20.1 problem section 9.4, problem 3
20.2 problem section 9.4, problem 8
20.3 problem section 9.4, problem 11
20.4 problem section 9.4, problem 14
20.5 problem section 9.4, problem 16
20.6 problem section 9.4, problem 18
20.7 problem section 9.4, problem 22
20.8 problem section 9.4, problem 23
20.9 problem section 9.4, problem 25
20.10 problem section 9.4, problem 27
20.11 problem section 9.4, problem 30
20.12 problem section 9.4, problem 32
20.13 problem section 9.4, problem 33
20.14 problem section 9.4, problem 35
20.15 problem section 9.4, problem 36
20.16 problem section 9.4, problem 39
20.17 problem section 9.4, problem 41