70.16 Chapter 4. Second order linear equations. Section 4.6 (Forced vibrations, Frequency response, and Resonance). Problems at page 272

70.16.1 problem 14
70.16.2 problem 16
70.16.3 problem 17
70.16.4 problem 18
70.16.5 problem 20
70.16.6 problem 21
70.16.7 problem 22
70.16.8 problem 23
70.16.9 problem 24