7 Chapter 1. What is a differential equation. Section 1.9. Reduction of Order. Page 38

  7.1 problem 1(a)
  7.2 problem 1(b)
  7.3 problem 1(c)
  7.4 problem 1(d)
  7.5 problem 1(e)
  7.6 problem 1(f)
  7.7 problem 1(g)
  7.8 problem 2(a)
  7.9 problem 2(b)
  7.10 problem 2(c)
  7.11 problem 3(a)
  7.12 problem 3(b)