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