Chapter 3. Second order linear equations. Section 22. Higher Order Linear Equations. Coupled Harmonic Oscillators. Problems at page 160

72.15.1 problem 1
72.15.2 problem 2
72.15.3 problem 3
72.15.4 problem 4
72.15.5 problem 5
72.15.6 problem 6
72.15.7 problem 7
72.15.8 problem 8
72.15.9 problem 9
72.15.10 problem 10
72.15.11 problem 11
72.15.12 problem 12
72.15.13 problem 13
72.15.14 problem 14
72.15.15 problem 15
72.15.16 problem 19 (a)
72.15.17 problem 19 (b)
72.15.18 problem 20
72.15.19 problem 21
72.15.20 problem 22 (a)
72.15.21 problem 22 (b)
72.15.22 problem 22 (c)
72.15.23 problem 23