88.10 Chapter 2. Differential equations of first order. Exercise at page 52

88.10.1 problem 1
88.10.2 problem 2
88.10.3 problem 3
88.10.4 problem 4
88.10.5 problem 5
88.10.6 problem 6
88.10.7 problem 7
88.10.8 problem 8
88.10.9 problem 9
88.10.10 problem 10
88.10.11 problem 11
88.10.12 problem 11