11 Chapter 8, Linear differential equations of order n. Section 8.9, Reduction of Order. page 572

11.1 problem Problem 1
11.2 problem Problem 2
11.3 problem Problem 3
11.4 problem Problem 4
11.5 problem Problem 5
11.6 problem Problem 6
11.7 problem Problem 10
11.8 problem Problem 11
11.9 problem Problem 12
11.10 problem Problem 13
11.11 problem Problem 14
11.12 problem Problem 15