2.6 Chapter IV. Methods of solution: First order equations. section 33. Problems at page 91

2.6.1 problem 1
2.6.2 problem 2 (eq 39)
2.6.3 problem 3 (eq 41)
2.6.4 problem 4 (eq 50)
2.6.5 problem 8 (eq 68)
2.6.6 problem 8 (eq 69)
2.6.7 problem 9 (a)
2.6.8 problem 9 (b)
2.6.9 problem 9 (c)
2.6.10 problem 9 (d)
2.6.11 problem 9 (e)
2.6.12 problem 10 (a)
2.6.13 problem 10 (b)
2.6.14 problem 10 (c)