3 Chapter 1, First order differential equations. Section 1.2 Antiderivatives. Exercises page 19

 3.1 problem 1
 3.2 problem 2
 3.3 problem 3
 3.4 problem 4(a)
 3.5 problem 4(b)
 3.6 problem 4(c)
 3.7 problem 6
 3.8 problem 7