10 Chapter 8, Linear differential equations of order n. Section 8.8, A Differential Equation with Nonconstant Coefficients. page 567

 10.1 problem Problem 14
 10.2 problem Problem 15
 10.3 problem Problem 16
 10.4 problem Problem 17
 10.5 problem Problem 18
 10.6 problem Problem 19
 10.7 problem Problem 20
 10.8 problem Problem 21
 10.9 problem Problem 22
 10.10 problem Problem 23