2 Chapter 8, Ordinary differential equations. Section 2. Separable equations. page 398

 2.1 problem 1
 2.2 problem 2
 2.3 problem 3
 2.4 problem 4
 2.5 problem 5
 2.6 problem 6
 2.7 problem 7
 2.8 problem 8
 2.9 problem 9
 2.10 problem 10
 2.11 problem 11
 2.12 problem 12