85.14 Chapter two. First order and simple higher order ordinary differential equations. C Exercises at page 41

85.14.1 problem 1 (a)
85.14.2 problem 1 (b)
85.14.3 problem 2
85.14.4 problem 3
85.14.5 problem 4
85.14.6 problem 5 (a)
85.14.7 problem 5 (b)
85.14.8 problem 6
85.14.9 problem 7