83.3 Chapter III. First order differential equations of the first degree. Ex. IV at page 38

83.3.1 problem 1 (a)
83.3.2 problem 1 (b)
83.3.3 problem 1 (c)
83.3.4 problem 1 (d)
83.3.5 problem 1 (e)
83.3.6 problem 2 (a)
83.3.7 problem 2 (b)
83.3.8 problem 3