5 Chapter 8, Ordinary differential equations. Section 5. SECOND-ORDER LINEAR EQUATIONSWITH CONSTANT COEFFICIENTS AND ZERO RIGHT-HAND SIDE. page 414

5.1 problem 1
5.2 problem 2
5.3 problem 3
5.4 problem 4
5.5 problem 5
5.6 problem 6
5.7 problem 7
5.8 problem 8
5.9 problem 9
5.10 problem 12
5.11 problem 19
5.12 problem 20
5.13 problem 24
5.14 problem 25
5.15 problem 26
5.16 problem 28