3 Chapter 1. Introduction– Linear equations of First Order. Page 45

3.1 problem 1(a)
3.2 problem 1(b)
3.3 problem 1(c)
3.4 problem 1(d)
3.5 problem 1(e)
3.6 problem 2
3.7 problem 3
3.8 problem 8
3.9 problem 14(a)
3.10 problem 14(b)
3.11 problem 14(b)