85.72 Chapter 7. Solution of differential equations by use of series. A Exercises at page 316

85.72.1 problem 1 (a)
85.72.2 problem 1 (b)
85.72.3 problem 1 (c)
85.72.4 problem 1 (d)
85.72.5 problem 1 (e)
85.72.6 problem 1 (f)
85.72.7 problem 1 (g)
85.72.8 problem 1 (h)
85.72.9 problem 1 (i)
85.72.10 problem 1 (j)
85.72.11 problem 2 (a)
85.72.12 problem 2 (b)
85.72.13 problem 2 (c)
85.72.14 problem 2 (d)
85.72.15 problem 2 (e)
85.72.16 problem 2 (f)
85.72.17 problem 4