2.8 Section 5.2, second order linear equations. Page 311

2.8.1 problem 21
2.8.2 problem 22
2.8.3 problem 23
2.8.4 problem 24
2.8.5 problem 26(a.1)
2.8.6 problem 26(a.2)
2.8.7 problem 26(b)