7 Chapter 8.3 Systems of Linear Differential Equations (Variation of Parameters). Problems page 514

 7.1 problem Problem 3(a)
 7.2 problem Problem 3(b)
 7.3 problem Problem 3(c)
 7.4 problem Problem 3(d)
 7.5 problem Problem 4(a)
 7.6 problem Problem 4(b)
 7.7 problem Problem 4(c)
 7.8 problem Problem 4(d)
 7.9 problem Problem 5(a)
 7.10 problem Problem 5(b)
 7.11 problem Problem 5(c)
 7.12 problem Problem 5(d)
 7.13 problem Problem 6(a)
 7.14 problem Problem 6(b)
 7.15 problem Problem 6(c)
 7.16 problem Problem 6(d)