85.88 Chapter 10. Systems of differential equations and their applications. A Exercises at page 499

85.88.1 problem 1 (a)
85.88.2 problem 1 (b)
85.88.3 problem 1 (c)
85.88.4 problem 1 (d)
85.88.5 problem 1 (e)
85.88.6 problem 1 (f)
85.88.7 problem 1 (g)
85.88.8 problem 1 (h)
85.88.9 problem 1 (i)
85.88.10 problem 1 (j)
85.88.11 problem 2 (a)
85.88.12 problem 2 (b)
85.88.13 problem 2 (c)
85.88.14 problem 2 (d)
85.88.15 problem 2 (f)
85.88.16 problem 2 (g)
85.88.17 problem 2 (h)