68.16 Chapter 4. Higher Order Equations. Exercises 4.8, page 203

68.16.1 problem 1
68.16.2 problem 2
68.16.3 problem 3
68.16.4 problem 4
68.16.5 problem 5
68.16.6 problem 6
68.16.7 problem 7
68.16.8 problem 8
68.16.9 problem 9
68.16.10 problem 10
68.16.11 problem 11
68.16.12 problem 12
68.16.13 problem 13
68.16.14 problem 14
68.16.15 problem 15
68.16.16 problem 16
68.16.17 problem 19
68.16.18 problem 20
68.16.19 problem 21
68.16.20 problem 22
68.16.21 problem 23 (a)
68.16.22 problem 23 (b)
68.16.23 problem 24 (a)
68.16.24 problem 24 (b)
68.16.25 problem 27 (a)